CN-121978822-A - Miniaturized aspheric transmission type wide-temperature optical antenna

CN121978822ACN 121978822 ACN121978822 ACN 121978822ACN-121978822-A

Abstract

The application relates to the technical field of optical communication and discloses a miniaturized aspheric transmission type wide-temperature optical antenna, wherein the optical antenna comprises a lens barrel, an aspheric single lens, a first space ring, an aspheric positive lens, a first spherical negative lens, a second space ring and a second spherical negative lens are sequentially arranged in the lens barrel of the optical antenna, the aspheric positive lens and the first spherical negative lens are glued to form a glued lens group, the first space ring is used for fixedly arranging the distance between the aspheric single lens and the glued lens group, the second space ring is used for dynamically adjusting the distance between an objective lens and an eyepiece, the objective lens consists of the aspheric single lens, the first space ring and the glued lens group, and the eyepiece lens is the second spherical negative lens. The beneficial effects are that the length of the optical antenna is shortened, the difficulty of installation and adjustment is reduced, and the miniaturization effect is achieved.

Inventors

WANG LI
WANG YANAN
YU HAN
YAN XUDE
XIE KEDI
Tan chan
ZHU REN

Assignees

上光通信技术(上海)有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. The miniature aspheric transmission type wide-temperature optical antenna comprises a lens barrel and is characterized in that an aspheric single lens, a first space ring, an aspheric positive lens, a first spherical negative lens, a second space ring and a second spherical negative lens are sequentially arranged in the lens barrel of the optical antenna; the aspheric positive lens and the first spherical negative lens are glued to form a glued lens group; the first space ring is used for fixedly setting the distance between the aspheric single lens and the cemented lens group; The second space ring is used for dynamically adjusting the distance between the objective lens and the ocular lens, the objective lens consists of the aspheric single lens, the first space ring and the cemented lens group, and the ocular lens is the second spherical negative lens.
2. The optical antenna of claim 1, wherein the entrance surface of the aspheric positive lens is an aspheric surface, the exit surface of the aspheric positive lens is a positive spherical surface, the entrance surface and the exit surface of the first spherical negative lens are both negative spherical surfaces, and the exit surface of the aspheric positive lens has the same curvature as the entrance surface of the first spherical negative lens.
3. The optical antenna of claim 2, wherein the material of the aspheric positive lens is crown glass and the material of the first spherical negative lens is flint glass.
4. An optical antenna according to any one of claims 1-3, wherein the incidence surface of the aspheric single lens is aspheric, the exit surface of the aspheric single lens is spherical, and the material of the aspheric single lens is crown glass.
5. An optical antenna according to any one of claims 1 to 3, wherein when the incidence surfaces of the aspherical single lens and the aspherical positive lens are higher order aspherical surfaces of higher order terms, the order of the higher order aspherical surfaces is less than or equal to 10 th order.
6. An optical antenna according to any one of claims 1-3, wherein the entrance and exit surfaces of the second spherical negative lens are spherical, and the material of the second spherical negative lens is flint glass.
7. The optical antenna according to any one of claims 1 to 3, wherein a total length of the objective lens and the eyepiece is smaller than or equal to a length of the lens barrel when a thickness of the second spacer is dynamically adjusted.
8. An optical antenna according to any one of claims 1 to 3, wherein the first spacer has a thickness of 8 to 12mm, the second spacer has a thickness of 30 to 70mm, and the lens barrel has a length of 85 to 95mm.
9. An optical antenna according to any one of claims 1 to 3, wherein the aperture of the incident beam of the lens barrel is 55 to 65mm, and the diameter of the aspherical single lens is larger than the aperture of the incident beam.
10. An optical antenna according to any one of claims 1-3, characterized in that the entrance face of the aspherical single lens is provided with an aperture stop of the optical antenna.

Description

Miniaturized aspheric transmission type wide-temperature optical antenna Technical Field The application relates to the technical field of optical communication, in particular to a miniaturized aspheric transmission type wide-temperature optical antenna. Background In an inter-satellite laser communication terminal, an optical telescope is used as an optical antenna, and is generally used for expanding a transmitted beam and contracting a received beam. As an optical antenna commonly used in an inter-satellite laser communication terminal, a coaxial transmission type optical antenna is formed by at least 6 spherical lenses in order to achieve aberration correction and to adapt to a wide temperature range, which results in a longer overall length of the optical antenna. In order to reduce the antenna length, turning mirrors are typically used, but this increases the tuning difficulty. Disclosure of Invention The application provides a miniaturized aspheric transmission type wide-temperature optical antenna, which solves the technical problem that the optical antenna in the prior art is difficult to mount and adjust after being introduced into a turning reflector, and achieves the technical effect of shortening the length of the optical antenna, thereby realizing miniaturization of the optical antenna and improving the mounting efficiency of the optical antenna. In order to achieve the above purpose, the main technical scheme adopted by the application comprises the following steps: In a first aspect, an embodiment of the present application provides a miniaturized aspheric transmissive wide-temperature optical antenna, where the optical antenna includes a lens barrel, and an aspheric single lens, a first spacer ring, an aspheric positive lens, a first spherical negative lens, a second spacer ring, and a second spherical negative lens are sequentially disposed in the lens barrel of the optical antenna; the aspheric positive lens and the first spherical negative lens are glued to form a glued lens group; the first space ring is used for fixedly setting the distance between the aspheric single lens and the cemented lens group; The second space ring is used for dynamically adjusting the distance between the objective lens and the ocular lens, the objective lens consists of the aspheric single lens, the first space ring and the cemented lens group, and the ocular lens is the second spherical negative lens. In the embodiment, the optical antenna is miniaturized through the combination of 4 lenses, and the installation efficiency of the light antenna is improved on the basis of ensuring the optical performance. The length of the optical antenna is shortened. In one example, the incidence surface of the aspheric positive lens is an aspheric surface, the emergence surface of the aspheric positive lens is a positive spherical surface, the incidence surface and the emergence surface of the first spherical negative lens are both negative spherical surfaces, and the emergence surface of the aspheric positive lens and the incidence surface of the first spherical negative lens have the same curvature. In this embodiment, by selecting the aspherical positive lens and the first spherical negative lens with matching curvatures, the means of bonding the aspherical positive lens and the first spherical negative lens realizes a high-precision achromatism effect, and ensures image quality in the miniaturized optical antenna. And the light-weight integrated effect of the lens is realized by the means, and the installation efficiency of the optical antenna is further improved. In one example, the material of the aspheric positive lens is crown glass, and the material of the first spherical negative lens is flint glass. In this embodiment, the combination of the aspheric positive lens and the first spherical negative lens can realize broadband achromatism through refractive index difference, so as to meet the multispectral imaging requirement and ensure the spectral range of the laser in the miniaturized light antenna. And the aspheric correction and chromatic aberration correction functions are integrated in a single module, so that the number of system elements is reduced, the assembly complexity is reduced, and the efficiency of the inter-satellite laser communication terminal in the installation and maintenance processes is improved. In one example, the incidence surface of the aspheric single lens is an aspheric surface, the emergent surface of the aspheric single lens is a spherical surface, and the material of the aspheric single lens is crown glass. In this embodiment, by setting the exit surface and the entrance surface of the aspherical single lens as an aspherical-spherical combination and using a means of manufacturing the aspherical single lens with crown glass, high-precision aberration correction is realized, and the use effect of the miniaturized optical antenna is ensured. In one example, when the incidence surfaces