Acta Optica Sinica, Volume. 3, Issue 5, 470(1983)
MTFA and characteristics frequency
The feasibility of MTFA (modulation transfer function area) for assessing imaging quality of visual telescopic systems is described. A method for simplifying the MTFA has been discussed briefly. The way for characteristics frequency selection by using linear regression analysis is presented. Through the MTF measurements of several 8 ? 30 telescopic systems the regression statistics have been obtained from the measured curves. We found that the characteristics spatial frequency may be chosen in a wider range. The optimum frequency is close to the half limit frequency. A simplifying scheme for the parameters used in MTF measnremeiit, i.e. wavelength, field angle, azimuth and dioptric, is also presented.
Get Citation
Copy Citation Text
SHA DINGGUO, ZHANG BINGXUN. MTFA and characteristics frequency[J]. Acta Optica Sinica, 1983, 3(5): 470