A monolithic broad-band achromatic refraction-diffraction hybrid lens and its design method
A technology of refracting-diffraction mixing and lens design, applied in the optical field, can solve the problems of poor imaging quality and large chromatic aberration of the lens, and achieve the effects of light weight, low manufacturing cost, and shortened thickness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0038] Embodiment 1: A single-chip broadband achromatic refraction-diffraction hybrid lens, such as figure 1 As shown, the refraction-diffraction hybrid lens includes a first optical surface 1, a second optical surface 2, and the first optical surface and the second optical surface have a common optical axis; wherein the first optical surface is a high-order aspheric surface, and the second optical surface The surface is a harmonic diffraction surface; the harmonic diffraction surface is composed of a base and a Fresnel zone superimposed on the base, wherein the base includes a plane, a spherical surface, an aspheric surface or a high-order aspherical surface;
[0039] The surface equation of the first optical surface is:
[0040]
[0041] where x 1 ,y 1 is the bottom coordinate of the first optical surface.
[0042] The base of the second optical surface is a high-order aspheric surface, and the high-order aspheric surface equation of the base is:
[0043]
[0044...
Embodiment 2
[0048] Embodiment 2: A design method of a single-chip broadband achromatic refractive-diffractive hybrid lens, according to the following formula:
[0049]
[0050] The focal power distribution of the first optical surface and the base of the second optical surface is carried out for the R-band, G-band and B-band respectively, and achromatic aberration is realized in the R-band, G-band and B-band, among which: R-band, G-band and B The bands respectively represent the red band, green band, and blue band in the incident light source of the single-chip wide-band achromatic refraction-diffraction hybrid lens, f' difis the focal length of the Fresnel zone of the second optical surface, f′ ref is the focal length of the first optical surface, f' is the focal length of the monolithic broadband achromatic refraction-diffractive hybrid lens, γ dif is the Abbe number of the Fresnel zone surface, γ ref is the Abbe number of the refractive material;
[0051] Then according to the fo...
Embodiment 3
[0068] Embodiment 3: A kind of VR glasses, including a frame, the single-chip wide-band achromatic refraction-diffraction hybrid lens in Embodiment 1, and the single-chip wide-band achromatic refraction-diffraction hybrid lens is installed on the frame, and on the frame A holding part for holding the display screen is provided.
[0069] In this embodiment, the present invention is compared with the patent "a biconvex lens for VR glasses" (authorized announcement number: CN 105785487 B) authorized in 2018.
[0070] CN 105785487 B discloses a biconvex lens for VR glasses, with an exit pupil diameter of 4mm, an exit pupil distance of 15mm, wavelengths of F, D, and C light, and a full field of view of 60°. According to the description in CN 105785487 B, the biconvex lens is optimized, and the final optimized optical path diagram is as follows Figure 8 shown. The center thickness of the optimized biconvex lens is 14.926mm, and the distance from the pupil of the human eye to the ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More