Design of polarized infrared athermal telephoto objective for penetrating the fog

Duorui, Gao; Fu, Qiang; Zhao, Zhao; Zhao, Bin; Zhong, Lijun; Jin, Zuanming

doi:10.1117/12.2072669

Cited by 2 publications

(2 citation statements)

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“…In such an optical system with an arbitrary number of elements, the following equations must be satisfied for axial color to be corrected [5][6][7][8][9][10][11]:…”

Section: Athermal and Achromatic Conditionsmentioning

confidence: 99%

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Graphical Selection of Optical Materials Using an Expanded Athermal Glass Map and Considering the Housing Material for an Athermal and Achromatic Design

Lim¹,

Kim²,

Park³

2015

Journal of the Optical Society of Korea

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This paper presents a new graphical method for selecting a pair of optical glass and housing materials to simultaneously achromatize and athermalize a multilens system composed of many elements. To take into account the lens spacing and housing, we quantify the lens power, chromatic power, and thermal power by weighting the ratio of the paraxial ray height at each lens to them. In addition, we introduce the equivalent single lens and the expanded athermal glass map including a housing material. Even though a lens system is composed of many elements, we can simply identify a pair of glass and housing materials that satisfies the athermal and achromatic conditions. Applying this method to design a black box camera lens equipped with a 1/4-inch image sensor having a pixel width of 2 µm, the chromatic and thermal defocusings are reduced to less than the depth of focus, over the specified ranges in temperature and frequency.

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“…In such an optical system with an arbitrary number of elements, the following equations must be satisfied for axial color to be corrected [5][6][7][8][9][10][11]:…”

Section: Athermal and Achromatic Conditionsmentioning

confidence: 99%

“…(9) into Eq. (8) results in an expression for the athermal and achromatic conditions for a doublet: (10) Assuming that the flange back distance is approximately equal to the back focal length, i.e.…”

Section: Athermal and Achromatic Conditionsmentioning

confidence: 99%