Prosecution Insights
Last updated: July 17, 2026
Application No. 17/475,819

MULTI-FIBER OPTICAL SENSOR FOR LIGHT AIRCRAFT

Non-Final OA §103
Filed
Sep 15, 2021
Examiner
VASQUEZ JR, ROBERT WILLIAM
Art Unit
3645
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Rosemount Inc.
OA Round
3 (Non-Final)
11%
Grant Probability
At Risk
3-4
OA Rounds
0m
Est. Remaining
19%
With Interview

Examiner Intelligence

Grants only 11% of cases
11%
Career Allowance Rate
2 granted / 18 resolved
-40.9% vs TC avg
Moderate +8% lift
Without
With
+8.3%
Interview Lift
resolved cases with interview
Typical timeline
4y 2m
Avg Prosecution
28 currently pending
Career history
66
Total Applications
across all art units

Statute-Specific Performance

§103
92.0%
+52.0% vs TC avg
§102
8.0%
-32.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 18 resolved cases

Office Action

§103
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Response to Amendment The Amendment filed March 16th, 2026 has been entered. Claims 1-4, 6-8, and 21 remain pending in the application. Election/Restrictions Claims 9-20 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected set of inventions, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on June 12th, 2025. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 1-4, 6-8, and 21 are rejected under 35 U.S.C. 103 as being unpatentable over Ray et al. (United States Patent Application Publication 20180024270), hereinafter Ray, in view of Guice et al. (United States Patent No. 8400348 B1), hereinafter Guice, further in view of Stann et al. (United States Patent No. 5608514 A), hereinafter Stann. Regarding claim 1, Ray teaches a multi-fiber optical sensor system (Title) comprising: a light source configured to generate light energy ([0026] Uncollimated system 26 includes laser diode 30); a transmitter fiber configured to receive the light energy from the light source and to project a projected light energy out of a projecting end of the transmitter fiber over a transmitter fiber field of view ([0041] FIG. 3 is a schematic diagram of another embodiment of a cloud conditions measurement system...First optical transmitter 120 includes fiber-coupled laser 124, transmitter fiber 126); a plurality of receiver fibers, wherein each of the plurality of receiver fibers has a receiving end aligned proximate and substantially parallel to the projecting end of the transmitter fiber and is configured to receive a received portion of the projected light energy reflected from a target within a receiver field of view, wherein the target includes a hard target and/or constituents of a cloud atmosphere; ([0044] Receiver fibers 140, 142 are oriented substantially parallel to and transmitter fiber 126, and receiver fibers 140, 142 have a field of view commensurate with (e.g., substantially equal to) the field of view corresponding to transmitter fiber 126, so as to receive backscattered signals from the volume of cloud atmosphere 12 that is probed by the uncollimated beam projected from transmitter fiber 126.); a detector configured to detect the portion of the projected light energy received by each of the plurality of receiver fibers ([0030] The backscattered signal detected by fiber-coupled detector 44 can then be modeled); a processor configured to determine a proximity of the hard target to the light aircraft based upon the received portion of the projected light energy, wherein the processor is further configured to determine conditions of the cloud atmosphere, including a super-cooled large droplet size present in the cloud atmosphere, based upon the received portion of the projected light energy ([0030] Fiber-coupled detector is capable of range-resolved measurements.; [0064] The processor can be configured to calculate a super-cooled large droplet size based on the detected portion of the transmitted light energy received by the receiver fiber.) wherein the receiver fiber field of view for each of the plurality of receiver fibers crosses the transmitter fiber field of view between a first crossing point at a distance Rmin from a lens axis and a last crossing point at a distance R., from the lens axis, wherein there is a center crossing point Rmid at a point where a centerline of the receiver fiber field of view for each of the plurality of receiver fibers crosses a centerline of the transmitter fiber field of view wherein the range between Rmin and R., for each of the plurality of receiver fibers defines a detection zone such that each of the plurality of receiver fibers has a unique detection zone (Fig. 3 illustrates the overlapping fields of view of the transmitting and receiving fibers as described, wherein the overlap defines a detection zone of a cloud, but each fiber has a distinct detection zone as well) wherein the multi-fiber optical sensor system is configured to cooperate with at least one additional multi-fiber optical sensor system positioned on the light aircraft such that the light aircraft is surrounded by detection zones in multiple directions ([0050] FIG. 5 is a schematic diagram of a multiple-direction cloud conditions measurement system. In FIG. 5, aircraft 10 is equipped with multiple-direction cloud conditions measurement system 214. Multiple-direction cloud conditions measurement system 214 includes three fiber bundles 200 a, 200 b, 200 c.) Ray fails to teach a sensor system comprising a lenslet array configured to shape the transmitter fiber field of view and give the transmitter field of view a finite cross-sectional area, wherein the lenslet array comprises a plurality of lens corresponding to the transmitter fiber and each of the plurality of receiver fibers and is further configured to shape the receiver fiber field of view for each of the plurality of receiver fibers, tilt the center of the field of view with respect to the axis of the projected light energy, and give the receiver fiber field of view for each of the plurality of receiver fibers a finite cross-sectional area that crosses with the transmitter fiber field of view less then 5m from a light aircraft on which the multi-fiber optical sensor is positioned to enable detection of the target within the receiver fiber field of view; However, Guice teaches a sensor system comprising a lenslet array configured to shape the transmitter fiber field of view and give the transmitter field of view a finite cross-sectional area, wherein the lenslet array comprises a plurality of lens corresponding to the transmitter fiber and each of the plurality of receiver fibers and is further configured to shape the receiver fiber field of view for each of the plurality of receiver fibers, tilt the center of the field of view with respect to the axis of the projected light energy, and give the receiver fiber field of view for each of the plurality of receiver fibers a finite cross-sectional area ([Col. 11, lines 4-7] An image receiving end 454a of a bundle 452 of fiber amplifier fibers may be affixed directly or via index matching gel or similar substance directly to a lenslet 474 array 468, as also illustrated in FIGS. 4c and 4d). It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this invention to modify the invention of Ray to comprise the lenslet array at the end of the fiber bundle similar to Guice, with a reasonable expectation of success. This would have the predictable result of directing laser light for each fiber in a bundle to have a unique field of view while maintaining compact space in the apparatus. Ray still fails to teach a system with a cross-sectional area that crosses with the transmitter fiber field of view less then 5m from a light aircraft on which the multi-fiber optical sensor is positioned to enable detection of the target within the receiver fiber field of view; However, Stann teaches a system with a cross-sectional area that crosses with the transmitter fiber field of view less then 5m from a light aircraft on which the multi-fiber optical sensor is positioned to enable detection of the target within the receiver fiber field of view ([Col. 1, lines 21-25] Moreover, the high carrier frequency allows ladar systems to be made more compact in physical dimension, which is particularly attractive in aircraft, projectile, space and other volume-limited applications.; [Col. 3, lines 43-46] Commercially available laser diodes having 2 GHz modulation bandwidths and output powers to 4 W will support embodiment of the present invention with resolutions less than 0.3 m and ranges to several kilometers.); It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this invention to modify the invention of Ray, and as modified by Guice to comprise the short range cross-sectional field of view similar to Stann, with a reasonable expectation of success. This would have the predictable result of generating a high resolution short range lidar image, compatible with the same medium and vehicle as the previous prior arts. Regarding claim 2, Ray, as modified above, teaches the multi-fiber optical sensor system of claim 1, wherein the transmitter fiber and the plurality of receiver fibers are bundled into a fiber bundle ([0048] FIG. 4 is a schematic diagram of an exemplary fiber bundle...FIG. 3. The depicted configuration of optical elements shows transmitter fibers 126, 156 bundled with receiver fibers 140, 142, 160.), Ray fails to teach the system wherein the lenslet array is positioned in front of a projecting/receiving end of the fiber bundle and each lens the lenslet array has a lens center that is nominally coincident with a center of a fiber end face corresponding to the lens. However, Guice teaches the system wherein the lenslet array is positioned in front of a projecting/receiving end of the fiber bundle and each lens the lenslet array has a lens center that is nominally coincident with a center of a fiber end face corresponding to the lens ([Col. 11, lines 4-7] An image receiving end 454a of a bundle 452 of fiber amplifier fibers may be affixed directly or via index matching gel or similar substance directly to a lenslet 474 array 468, as also illustrated in FIGS. 4c and 4d). It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this invention to modify the invention of Ray to comprise the lenslet array at the end of the fiber bundle similar to Guice, with a reasonable expectation of success. This would have the predictable result of directing laser light for each fiber in a bundle to have a unique field of view while maintaining compact space in the apparatus. Regarding claim 3, Ray, as modified above, teaches the multi-fiber optical sensor system of claim 1, wherein each of the plurality of receiver fibers can provide a distinct field of view ([0054] The projected pulse of light energy is projected over a field of view determined by a numerical aperture of a transmission end of the transmitter fiber; [0058] The projected second pulse of light energy can be projected over a field of view determined by a numerical aperture of a second transmission end of the second transmitter fiber.), a polarization receiving channel ([0070] The circular polarizing element can be configured to circularly polarize the second pulse of light energy. The second and third detectors can be configured to detect circularly polarized light energy of opposite polarization directions;), and a wavelength receiving channel ([0065] The second laser diode can be configured to generate a second pulse of light energy of a second wavelength different from the first wavelength. The second detector can be configured to detect the portion of the second pulse of light energy backscattered by the cloud atmosphere.). Regarding claim 4, Ray, as modified above, teaches the multi-fiber optical sensor system of claim 1, wherein the light source is a laser diode, light emitting diode, or any other light source ([0026] Uncollimated system 26 includes laser diode 30). Regarding claim 6, Ray, as modified above, teaches the multi-fiber optical sensor system of claim 1, wherein the light source is a laser diode, light emitting diode, or any other light source ([0026] Uncollimated system 26 includes laser diode 30), the transmitter fiber and the plurality of receiver fibers are bundled into a fiber bundle ([0048] FIG. 4 is a schematic diagram of an exemplary fiber bundle… FIG. 3. The depicted configuration of optical elements shows transmitter fibers 126, 156 bundled with receiver fibers 140, 142, 160.), Ray fails to teach a system with the lenslet array positioned in front of a projecting/receiving end of the fiber bundle and each lens the lenslet array has a lens center that is nominally coincident with a center of a fiber end face corresponding to the lens. However, Guice teaches a system with the lenslet array positioned in front of a projecting/receiving end of the fiber bundle and each lens the lenslet array has a lens center that is nominally coincident with a center of a fiber end face corresponding to the lens ([Col. 11, lines 4-7] An image receiving end 454a of a bundle 452 of fiber amplifier fibers may be affixed directly or via index matching gel or similar substance directly to a lenslet 474 array 468, as also illustrated in FIGS. 4c and 4d). It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this invention to modify the invention of Ray to comprise the lenslet array at the end of the fiber bundle similar to Guice, with a reasonable expectation of success. This would have the predictable result of directing laser light for each fiber in a bundle to have a unique field of view while maintaining compact space in the apparatus. Regarding claim 7, Ray, as modified above, teaches the multi-fiber optical sensor system of claim 1, wherein the target is one or more constituents of a cloud atmosphere, the unique detection zone for each of the plurality of receiver fibers corresponds to a sampling location within the cloud atmosphere, and the multi-fiber optical sensor system further comprises a processor configured to determine conditions of the cloud atmosphere, including a super-cooled large droplet size present in the cloud atmosphere, based on the received portion of the projected light energy ([0019] Apparatus and associated methods relate to sampling a large volume of a cloud atmosphere so as to obtain a large signal response from even a sparse distribution of water droplets in the cloud atmosphere; [0064] The processor can be configured to calculate a super-cooled large droplet size based on the detected portion of the transmitted light energy received by the receiver fiber). Regarding claim 8, Ray, as modified above, teaches the multi-fiber optical sensor system of claim 7, wherein the light source is a laser diode, light emitting diode, or any other light source ([0026] Uncollimated system 26 includes laser diode 30), each of the plurality of receiver fibers can provide a distinct field of view ([0054] The projected pulse of light energy is projected over a field of view determined by a numerical aperture of a transmission end of the transmitter fiber; [0058] The projected second pulse of light energy can be projected over a field of view determined by a numerical aperture of a second transmission end of the second transmitter fiber.), a polarization receiving channel ([0070] The circular polarizing element can be configured to circularly polarize the second pulse of light energy. The second and third detectors can be configured to detect circularly polarized light energy of opposite polarization directions;), and a wavelength receiving channel ([0065] The second laser diode can be configured to generate a second pulse of light energy of a second wavelength different from the first wavelength. The second detector can be configured to detect the portion of the second pulse of light energy backscattered by the cloud atmosphere.), the transmitter fiber and the plurality of receiver fibers are bundled into a fiber bundle ([0048] FIG. 4 is a schematic diagram of an exemplary fiber bundle), Ray fails to teach the system wherein the lenslet array is positioned in front of a projecting/receiving end of the fiber bundle and each lens the lenslet array has a lens center that is nominally coincident with a center of a fiber end face corresponding to the lens. However, Guice teaches the system wherein the lenslet array is positioned in front of a projecting/receiving end of the fiber bundle and each lens the lenslet array has a lens center that is nominally coincident with a center of a fiber end face corresponding to the lens ([Col. 11, lines 4-7] An image receiving end 454a of a bundle 452 of fiber amplifier fibers may be affixed directly or via index matching gel or similar substance directly to a lenslet 474 array 468, as also illustrated in FIGS. 4c and 4d). It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this invention to modify the invention of Ray to comprise the lenslet array at the end of the fiber bundle similar to Guice, with a reasonable expectation of success. This would have the predictable result of directing laser light for each fiber in a bundle to have a unique field of view while maintaining compact space in the apparatus. Regarding claim 21, Ray, as modified above, teaches the multi-fiber optical sensor system of claim 1, Ray fails to teach the system wherein the hard target is a building, tree, utility pole, power line, or terrain. However, Guice teaches the system wherein the hard target is a building, tree, utility pole, power line, or terrain ([Col. 4, lines 41-48] Cases 1 and 2 described above are important for implementation of some embodiments of airborne biota monitoring and control since, in some embodiments, radar beams may be employed which have a generally horizontal direction in close proximity to the ground or other significant scattering sources, such as trees, utility lines and support structures, vehicles, buildings, fences, and other objects typically found in the vicinity of agricultural crops.). It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this invention to modify the invention of Ray to comprise the hard target constituting a building, tree, utility pole, power line or terrain similar to Guice, with a reasonable expectation of success. This would have the predictable result of using conventionally encountered items as a predetermined criteria for hard target detection. Response to Arguments Applicant's arguments filed March 16th, 2026 have been fully considered but they are not persuasive. Regarding the applicants argument that Stann fails to teach the above mentioned limitation of claim 1, the argument is found unpersuasive for reasons stated previously in the correspondence related to this application. Stann, as prior art brought in through a 35 U.S.C. 103 rejection, is obvious to combine with the prior art of Ray, which does mention the multi-fiber configuration of the present application, as both are targeted to address aircraft scanning systems with a similar design. The first cited prior art paragraph, as shown previously and above, describes this overlapping area of interest in the two prior art of record. Where the prior art of Ray fails in relation to the current application is specifically in designating a target region as stated in the limitation. This is the specific claim limitation which Stann overcomes, designing a system that can scan such a close region, and the configuration of which would be obvious to combine with the other prior art of record for reasons stated above. As such the rejection is maintained in this new Non-Final Office Action. Regarding the argument that the new amendments overcome the prior art of record, newly cited sections of the prior art of Ray have been included above that teach the limitations as amended. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ROBERT WILLIAM VASQUEZ JR whose telephone number is (571)272-3745. The examiner can normally be reached Monday thru Thursday, Flex Friday, 8:00-5:00 PST. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, HELAL ALGAHAIM can be reached at (571)270-5227. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ROBERT W VASQUEZ/Examiner, Art Unit 3645 /HELAL A ALGAHAIM/SPE , Art Unit 3645
Read full office action

Prosecution Timeline

Show 1 earlier event
Jul 21, 2025
Non-Final Rejection mailed — §103
Oct 17, 2025
Response Filed
Dec 16, 2025
Final Rejection mailed — §103
Feb 17, 2026
Response after Non-Final Action
Mar 16, 2026
Request for Continued Examination
Mar 27, 2026
Response after Non-Final Action
Apr 20, 2026
Non-Final Rejection mailed — §103
Jul 14, 2026
Interview Requested

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12607745
REDUCED-SIZE FMCW HETERODYNE-DETECTION LIDAR IMAGER SYSTEM
3y 7m to grant Granted Apr 21, 2026
Patent 12436282
DISTANCE MEASURING DEVICE
4y 1m to grant Granted Oct 07, 2025
Study what changed to get past this examiner. Based on 2 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
11%
Grant Probability
19%
With Interview (+8.3%)
4y 2m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 18 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month