Thus , it is quite necessary to deeply investigate some related problems , such as stray light transfer , stray light analysis and calculation , stray light suppression method , and baffle system design , bi - directional reflectance distribution function ( brdf ) of material surface , and accurate quantitative analysis and measurement of stray light performance of optical systems , like point source transmittance ( pst ) etc . this paper introduces stray light suppression method 因此,對系統(tǒng)雜光的產(chǎn)生和傳輸、分析和計(jì)算、雜光抑制措施的采用與遮光系統(tǒng)的設(shè)計(jì)、材料表面brdf以及系統(tǒng)雜光pst的定量測試等方面進(jìn)行深入研究,是非常有必要的。