Multi-aperture near-field large-area optical system and design method of scanning lens
An optical system, multi-aperture technology, applied in optics, optical components, instruments, etc., can solve cumbersome problems
Active Publication Date: 2015-07-01
上海济物光电技术有限公司
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With the help of theoretical calculations, the trajectory of the periphery of the scanning beam on the scanning mirror is calculated according to geometric optics to determine the size of the scanning mirror. This method is abstract and cumbersome, especially for the beam aperture and field of view used by multiple channels in the spatial layout. For systems with different parameters such as
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[0035] according to figure 1 Based on the optical structure diagram, a scanning mirror with a large viewing area and a double-aperture short-distance system is designed. The optical system is arranged in parallel with optical channel A and optical channel B. Channel A has 2 apertures and a field of view of 4.24°×4.24°; channel B has 3 apertures and a field of view of 4.24°×4.24°. The size of the two apertures is 10mm×10mm, and the distance between the centers is 12mm. The optical axis of the two-dimensional turning mirror 4 is 30mm away from the center of the common aperture of apertures 2 and 3 in the z direction. The distance between the two-dimensional scanning mirror 5 is 129mm in the x direction and 83.5mm in the y direction. The vertical distance H between the scanning mirror and the ground is 1.7M. The ground scanning area ABCDEF, the swing scanning angle is 50°~-60°, and the pitch scanning angle is 0~60°.
[0036] Table 1 Global coordinates of each point
[0037] ...
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The invention discloses a multi-aperture near-field large-area optical system and a design method of a scanning lens. The system comprises a rear optical part, aperture of an optical channel A, aperture of an optical channel B, a two-dimensional diffracting turning lens and a two-dimensional scanning lens. The two-dimensional scanning lens two-dimensionally scans a target in an area ABCDEF of a detected face. According to the principle of reversibility of an optical path, the design method of the scanning lens includes the steps of establishing a coordinate system, and calculating coordinates of faces and points; establishing a model in an optical design file, and solving the model; 1, solving coordinate attitude of the two-dimensional turning lens, 2, setting visual-field vignetting factors of two apertures, 3, solving coordinate attitude of the two-dimensional scanning lens, 4, modeling visual fields of the apertures and scanning attitudes, 5, adjusting the attitude of the two-dimensional scanning lens in the model so that the model is made consistent to a mechanical model, and 6, determining the size of the two-dimensional scanning lens. Compared with the pure geometric light theory, the design method has the advantages calculation is more accurate and quicker.
Description
technical field [0001] The invention relates to the design of optical elements, in particular to a design method of a multi-aperture short-distance large viewing area optical system and a scanning mirror. Background technique [0002] For instruments in the field of aerospace remote sensing, in order to reduce the difficulty of optical design and reduce its requirements for photoelectric receiving devices, and to increase the detection field of view, large field of view detection is realized through scanning mirrors. For example, in a linear array multispectral imaging system, the received instantaneous field of view moves perpendicular to the flight direction through the rotation of the scanning mirror, so as to realize line scanning and cooperate with the forward movement of the aircraft to complete two-dimensional scanning. The scanning characteristics of this type of system are: the scanning mirror scans back and forth in one dimension, the field of view of the static op...
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IPC IPC(8): G02B27/00G02B26/10G02B17/02
CPCG02B17/02G02B26/105G02B27/0012
Inventor 袁立银何志平舒嵘王建宇
Owner 上海济物光电技术有限公司