Design of Long-wave image square scanning optical system based on double optical wedges

JIANG Zikang; LIU Xin; LI Xiaojie; LI Fusheng; CHEN Qingshan; LV Yong

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Design of Long-wave image square scanning optical system based on double optical wedges

Optical Devices & System Design | 更新时间：2026-07-23

- Design of Long-wave image square scanning optical system based on double optical wedges
- OPTICAL TECHNIQUE Vol. 52, Issue 4, Pages: 403-410(2026)
- 作者机构：
  
  北京信息科技大学仪器科学与光电工程学院，北京 100192
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN202
- Received：26 April 2026，
  
  Revised：2026-05-19，
  
  Accepted：29 May 2026，
  
  Online First：23 July 2026，
  
  Published：20 July 2026
- 稿件说明：
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姜子康,刘鑫,李晓杰等.基于双光楔的长波像方扫描光学系统设计[J].光学技术,2026,52(04):403-410.

JIANG Zikang,LIU Xin,LI Xiaojie,et al.Design of Long-wave image square scanning optical system based on double optical wedges[J].OPTICAL TECHNIQUE,2026,52(04):403-410.
姜子康,刘鑫,李晓杰等.基于双光楔的长波像方扫描光学系统设计[J].光学技术,2026,52(04):403-410. DOI：

JIANG Zikang,LIU Xin,LI Xiaojie,et al.Design of Long-wave image square scanning optical system based on double optical wedges[J].OPTICAL TECHNIQUE,2026,52(04):403-410. DOI：

摘要

针对传统长波红外探测光学系统在大视场应用中存在视场范围受限、整体结构尺寸偏大以及重量较高等不足，设计了一种基于双光楔偏转的长波像方扫描光学系统。系统通过引入双光楔旋转扫描机制，在保证成像性能的基础上实现大范围视场获取，并有利于系统的小型化和轻量化。整体光学结构由前置望远光学系统、双光楔扫描单元和后端成像光学系统组成。前置望远部分采用开普勒式结构，利用其中间实像面的特点，为系统出瞳与入瞳的匹配提供了便利，也降低了后续扫描与成像模块的耦合难度。成像光学系统围绕长波红外工作波段进行优化设计，实现了与前置望远系统的光瞳匹配，并兼顾了较大的相对孔径和较好的像质表现。最终，将前置望远系统与成像系统完成耦合，并结合双光楔实现像方扫描后，系统可获得±25°的物方扫描范围。在8~12μm工作波段内，系统在42lp/mm处的调制传递函数大于0.3，弥散斑半径小于8μm，表明设计具有较好的成像质量，能够满足长波红外大视场扫描成像的应用需求。

Abstract

Aiming at the shortcomings of traditional long-wave infrared detection optical system in large field of view application

such as limited field of view

large overall structure size and high weight

a long-wave image scanning optical system based on double wedge deflection is designed. By introducing a dual-wedge rotation scanning mechanism

the system achieves a wide range of field of view acquisition on the basis of ensuring imaging performance

which is conducive to the miniaturization and lightweight of the system. The overall optical structure is composed of a front telescope optical system

a double wedge scanning unit and a back-end imaging optical system. The pre-telescope part adopts the Kepler structure

which provides convenience for the matching of the exit pupil and the entrance pupil of the system by using the characteristics of the middle real image plane

and also reduces the coupling difficulty of the subsequent scanning and imaging module. The imaging optical system is optimized around the long-wave infrared working band

which realizes the pupil matching with the front telescope system

and takes into account the larger relative aperture and better image quality performance. Finally

the front telescope system is coupled with the imaging system

and the image scanning is realized by combining the two optical wedges. The system can obtain an object scanning range of ±25°. In the working band of 8 ~ 12 μm

the modulation transfer function of the system at 42 lp / mm is greater than 0.3

and the radius of the dispersion spot is less than 8 μm. It shows that the design has good imaging quality and can meet the application requirements of long-wave infrared large field scanning imaging.

关键词

Keywords

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