Laser & Optoelectronics Progress, Volume. 51, Issue 10, 102201(2014)
Design of“Solar Blind”Ultraviolet Zoom Optical System Used in Corona Detection
According to the requirements of corona detection on searching targets with large field of view and detecting objects with small field of view, a refractive zoom optical system using mechanical compensation technology and working at“solar blind”ultraviolet wavelength (0.24~0.28 μm ) is designed. According to the requirements of users, the focal length spreads from 30 mm to 60 mm, and F number is 3.5. PIXIS 1024BUV CCD with size of 1 inch (1 inch=2.54 cm) and pixel size of 13 μm ×13 μm is used as a sensor. The field of view of the system is 8°~16°. The zoom lens consists of eight lenses with two aspherical surfaces, so it has the advantages of low cost and simple structure . The design results show that the modulation transfer function (MTF) of the zoom system is higher than 0.7 at cut off frequency of 38 lp/mm. The optical performance at all fields of view and all zooming conditions is close to the diffraction- limited image, and the distortion is less than 3% . So the zoom optical system presents a good image quality, and can meet users′ requirements.
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Zhang Hongjia, Ma Jun, Zhu Haiyu, Wang Wensheng. Design of“Solar Blind”Ultraviolet Zoom Optical System Used in Corona Detection[J]. Laser & Optoelectronics Progress, 2014, 51(10): 102201
Category: Reviews
Received: Apr. 9, 2014
Accepted: --
Published Online: Sep. 22, 2014
The Author Email: Hongjia Zhang (451661370@qq.com)