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US 12,625,310 B2Granted
Optical filter
AssigneeLms Co., Ltd.
InventorsJung Yeol Shin, Tae Jin Song, Seong Yong Yoon, Jin Hwan Kim
Life of this patent
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Abstract
The present invention provides an optical filter having a narrow bandpass, high transmittance in the bandpass, low transmittance outside the bandpass, little change in optical properties even when the incident angle of light changes and thus, being advantageous in terms of yield and cost per hour. In addition, the present invention may provide a LiDAR system including the optical filter and an application of the optical filter and the LiDAR system.
Claims20
An optical filter comprising:
- a reflective layer including a first layer and a second layer, formed in the reflective layer, respectively,
- wherein the first layer is an amorphous silicon layer having a measured Raman peak of 495 cm−1 or more and 500 cm−1 or less, and the second layer has a lower refractive index than a refractive index of the amorphous silicon layer, and
- wherein the optical filter shows a transmission band having a bandwidth within a range of 20 nm to 150 nm within a wavelength range of 700 nm to 2,000 nm and has an average transmittance of 5% or less in a wavelength band other than the wavelength forming the transmission band within a wavelength range of 700 nm to 2,000 nm.
Dependencies are inferred from the claim text.