Patent ID: 11867562
Assignee: VISERA TECHNOLOGIES COMPANY LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. The optical device as claimed in claim 1, further comprising an optical spacer with λ/4n±0.2 μm optical path inserted between a long-wavelength infrared (LWIR) reflection mirror and the photon conversion thin film to make an optical electric field of IR light located on the photon conversion thin film, wherein λ, is a wavelength of the IR light, and n is a refractive index of the optical spacer, wherein the LWIR reflection mirror comprises a stack of a first dielectric layer, a metal layer and a second dielectric layer, and the metal layer is sandwiched between the first dielectric layer and the second dielectric layer, wherein the first dielectric layer and the second dielectric layer have a refractive index greater than 1.3 and a thickness ranging from 5 nm to 200 nm, and the metal layer has a refractive index less than 1 in a visible region and a thickness ranging from 1 nm to 50 nm.