A short-wave infrared imaging spectrometer telescope

By designing a telescope objective for a shortwave infrared imaging spectrometer, which uses a combination of 11 glass spherical mirrors and specific lenses to achieve a telecentric image design, the problem of light not being able to be incident perpendicularly is solved, reducing costs and improving production efficiency.

CN224383531UActive Publication Date: 2026-06-19CHONGQING PUSIDA TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHONGQING PUSIDA TECH CO LTD
Filing Date
2025-08-28
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing fixed-focus industrial lenses are not designed with an image-side telecentricity, which prevents the light from short-wave infrared imaging spectrometers from being incident perpendicularly onto the PGP beam splitter system, increasing cost and design complexity.

Method used

Design a telescope objective for a shortwave infrared imaging spectrometer. Employ 11 glass spherical mirrors and achieve a telecentric image design through a specific lens combination and bonding method. This ensures that the principal ray is incident perpendicularly to the entrance slit, meeting system requirements.

Benefits of technology

It achieves a simple and low-cost image-side telecentric design, with the main ray incident perpendicularly to the entrance slit, meeting system requirements, reducing optical cold processing costs, and improving production efficiency and lens utilization.

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Abstract

This invention provides a telescope objective for a short-wave infrared imaging spectrometer, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, an aperture stop, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens. The structure is simple, with all lenses being glass spherical mirrors. Each lens uses domestically produced glass, offering advantages such as high production frequency, ample supply, and low cost. The use of the same material for some lenses improves production efficiency and reduces optical cold processing costs. Furthermore, the design of this invention is image-side telecentric, ensuring that the principal rays from each field of view are perpendicularly incident on the image plane. This satisfies the requirement that the principal rays from each field of view are perpendicularly incident on the entrance slit of the short-wave infrared imaging spectrometer, fulfilling the system's requirements for the front telescope objective.
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