CAJ | 학술논문

阐述了二次成像红外光学系统相比于一次成像红外光学系统而言，对温度变化更加敏感的特点及其影响，讨论了基于光学被动式无热化原理的二次成像红外光学系统的设计方法。不仅给出了设计的一个红外制冷型二次成像光学系统的实例，还对该无热化镜头进行了实际加热对比成像试验，并给出了成像测试结果。设计结果表明：该系统在-40℃～+80℃的温度范围内，像质接近衍射限，最佳像面变化量在一倍焦深范围之内，焦距变化率低，实现了光学被动式无热化。实际测试结果显示，所设计的二次成像无热化光学系统，具有良好的无热化能力，高温环境下无需调焦依然清晰成像。
천술료이차성상홍외광학계통상비우일차성상홍외광학계통이언，대온도변화경가민감적특점급기영향，토론료기우광학피동식무열화원리적이차성상홍외광학계통적설계방법。불부급출료설계적일개홍외제랭형이차성상광학계통적실례，환대해무열화경두진행료실제가열대비성상시험，병급출료성상측시결과。설계결과표명：해계통재-40℃～+80℃적온도범위내，상질접근연사한，최가상면변화량재일배초심범위지내，초거변화솔저，실현료광학피동식무열화。실제측시결과현시，소설계적이차성상무열화광학계통，구유량호적무열화능력，고온배경하무수조초의연청석성상。
The image quality of re-imaging infrared optical system is quite sensitive to temperature, compared with common optical system,its characteristics and effect was discussesed in the paper. And the optical-passive design theory of athermalization was described. An instance of a cooled re-imaging infrared optical system was given, the heating contrast experiment was carried out and the test result was shown. The athermal ability of the designed optical system and the common non-athermal optical system were tested by experiment with the same optical parameters such as focal length, field of views etc. The design result shows that the system is athermalized because the image quality of the system is close to the diffraction limit in the temperature range -40℃~+80℃ without focusing mechanism, and the shift rate of the focal length is relatively low. The test result shows the athermal ability of this system can remain its image quality in high temperature environment without refocusing.