Large-view-field infrared thermal imaging optical system and application thereof
An infrared thermal imaging and optical system technology, which is applied in the optical field to achieve the effects of high spatial resolution imaging capability, high illumination uniformity, and large imaging field of view
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[0042]Example
[0043]Such asFigure 1 to 6 As shown, the large field of view of the present invention is in the optical axis from the object surface to the image plane IMA, including the meniscus-shaped negative optical focus lens L1, aperture S, dual-convex positive focus lens L2 and meniscus The positive light coke lens L3. Among them, the aperture S provided between the meniscus negative optical focus lens L1 and the bifurcuous positive focus lens L2 is aperture S.
[0044]In order to reduce the high angle incident light into the optical system, the distortion is high-grade aberration, the meniscus-shaped negative optical power ratio lens L1 is maximum in the angle of the axis outer light rays. 1 / γ is satisfied:
[0045]1.5 ≤ 1 / γ ≤ 2.4.
[0046]The focus φL1 of the meniscus L1 and the imaging optical system focus φ satisfies the following relationships:
[0047]-0.45 ≤ φL1 / φ ≤ -0.30.
[0048]The focus φL2 of the double convex positive focus lens L2 and the imaging optical system focus φ sati...
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