optical filter
By using resin film and dielectric multilayer film in the filter, the problem that existing filters cannot transmit near-infrared light above 900nm is solved, achieving excellent transmittance of visible light and specific near-infrared light and excellent blocking of other near-infrared light, thus improving the performance of the image sensor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AGC INC
- Filing Date
- 2021-10-04
- Publication Date
- 2026-07-17
AI Technical Summary
Existing filters cannot effectively transmit near-infrared light above 900nm, while blocking other near-infrared light, thus failing to meet the sensor requirements for sensing human activity.
A filter with a resin film is used, which contains NIR pigments in dichloromethane with the maximum absorption wavelength in the range of 690nm to 900nm. Combined with a multilayer medium film, it meets specific spectral transmittance and reflectance conditions, achieving excellent transmittance of visible light and specific near-infrared light, and excellent blocking of other near-infrared light.
It achieves excellent transmission of visible light and light in the wavelength range of 900nm to 1000nm, excellent blocking of light in the wavelength range of 700nm to 900nm, suppresses the reduction of near-infrared light blocking at high incident angles, and ensures the color reproduction and transparency of the image.
Smart Images
Figure CN122410690A_ABST