Yue Baoyi, Liu Jun, Guo Jia, Chen Yang, Li Han. Optical system design of folded/diffractive co-aperture infrared dual-band beam positioner[J]. Infrared and Laser Engineering, 2019, 48(4): 418003-0418003(9). doi: 10.3788/IRLA201948.0418003
| Citation:
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Yue Baoyi, Liu Jun, Guo Jia, Chen Yang, Li Han. Optical system design of folded/diffractive co-aperture infrared dual-band beam positioner[J]. Infrared and Laser Engineering, 2019, 48(4): 418003-0418003(9). doi: 10.3788/IRLA201948.0418003
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Optical system design of folded/diffractive co-aperture infrared dual-band beam positioner
- 1.
School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710021,China;
- 2.
Xi'an Research Institute of Applied Optics,Xi'an 710065,China;
- 3.
China Baicheng Weapons Experiment Center,Baicheng 137001,China
- Received Date: 2018-11-19
- Rev Recd Date:
2018-12-23
- Publish Date:
2019-04-25
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Abstract
Aiming at the problem of small-field, central obscuration and low anergy of reflective optical system, the dual-mode beam positioner optical system of a folded/diffractive co-aperture infrared dual-band positioner was proposed. Based on achromatic theory and MRTD model, the equations of wavelength band achromaticity and action distance were deduced, respectively. With the property of a common focal length in the dual-band optical system, dual-band simultaneous detection and consistency of target information identification were achieved. The parameters of the folded/diffractive co-aperture infrared dual-band positioner optical system were as follows:wavelengths are 3.4-4.8 m and 7.7-9.5 m, pitch/yaw is -26-26. focal length is 115 mm and F number is 2. The results show that thermal difference eliminated in the temperature range of -40-60℃, the optical transfer function is close to the diffraction limit.
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