Holographic optical element viewfinder
US-2024288695-A1 · Aug 29, 2024 · US
in illumination systems (mask illumination systems in photolithographic systems G03F7/70158)
in illumination systems (mask illumination systems in photolithographic systems G03F7/70158) · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G02B27/425 |
| Official title | {in illumination systems (mask illumination systems in photolithographic systems G03F7/70158)} |
| Display label | in illumination systems (mask illumination systems in photolithographic systems G03F7/70158) |
| Total patents | 510 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 27 |
| 2017 | 52 |
| 2018 | 32 |
| 2019 | 74 |
| 2020 | 98 |
| 2021 | 74 |
| 2022 | 44 |
| 2023 | 43 |
| 2024 | 35 |
| 2025 | 17 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vehicle navigational system
US-2017358220-A1 · Dec 14, 2017 · US
Laser Diode Collimator and a Pattern Projecting Device Using Same
US-2017351110-A1 · Dec 7, 2017 · US
Illuminated cup holder
US-9809161-B1 · Nov 7, 2017 · US
Grating coupled light guide
US-2017299794-A1 · Oct 19, 2017 · US
Microscope illumination system
US-9766446-B2 · Sep 19, 2017 · US
Illumination apparatus and biometric authentication apparatus
US-9746687-B2 · Aug 29, 2017 · US
Laser illumination device
US-9746688-B2 · Aug 29, 2017 · US
Structured Light Sensing for 3D Sensing
US-2017234679-A1 · Aug 17, 2017 · US
Structured illumination apparatus, structured illumination microscopy apparatus, and profile measuring apparatus
US-9709785-B2 · Jul 18, 2017 · US
Microscope having a correction unit for correcting a variable spherical aberration
US-2017192227-A1 · Jul 6, 2017 · US
Illumination modules that emit structured light
US-2017188016-A1 · Jun 29, 2017 · US
Light field management in an optical biological parameter sensor
US-2017164848-A1 · Jun 15, 2017 · US
Electronic Device with Modulated Light Flash Operation for Rolling Shutter Image Sensor
US-2017150021-A1 · May 25, 2017 · US
Optical apparatus
US-2017108698-A1 · Apr 20, 2017 · US
Microlens array and optical system including the same
US-2017074481-A1 · Mar 16, 2017 · US
Illumination device and display apparatus
US-2017064271-A1 · Mar 2, 2017 · US
Lighting apparatus
US-2017038505-A1 · Feb 9, 2017 · US
Optical pattern projection
US-9554122-B2 · Jan 24, 2017 · US
Planar high angle line generator
US-2017003510-A1 · Jan 5, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G02B27/425?
- CPC G02B27/425 is the Cooperative Patent Classification code for “in illumination systems (mask illumination systems in photolithographic systems G03F7/70158).”
- How many patents are filed under CPC G02B27/425 (in illumination systems (mask illumination systems in photolithographic systems G03F7/70158))?
- Our database includes 510 publications tagged with this CPC code.
- Is patent activity under CPC G02B27/425 growing?
- Publication counts under this code: 35 in 2024 vs 17 in 2025 (latest complete years).