CPC G02B 5/1847 (2013.01) [G02B 5/1819 (2013.01); G02B 5/1861 (2013.01); G02B 5/1866 (2013.01); G02B 27/0081 (2013.01); G02B 27/0101 (2013.01); G02B 27/4272 (2013.01); G02B 5/26 (2013.01); G02B 6/29308 (2013.01)] | 32 Claims |
1. A diffraction grating device comprising:
a light reflection substrate; and
a diffraction grating arranged on the light reflection substrate,
wherein the diffraction grating comprises a plurality of diffraction elements, and
wherein the diffraction grating device further comprises a dielectric layer between the light reflection substrate and the diffraction grating, wherein a thickness of the dielectric layer is an integer multiple of a wavelength of light incident on the diffraction grating.
|