點片曝光 的英文怎麼說
中文拼音 [diǎnpiānpùguāng]
點片曝光
英文
spot exposure-
Since the dichromated gelatin has a higher diffraction efficiency in all holographic recording materials, the aim of this research is to use dichromated gelatin as the recording material and to make use of the principle of holography to design holographic optical components, especially in fabrication procedure of dichromated gelatin film and in experimental technique to form a high diffraction efficiency using different angular exposure method
為了產生優質的聚焦能力與效率,本研究採用目前具有最高繞射效率( 80 ~ 90 % )的重鉻酸明膠材料作為感光劑,除了自行調制藥劑比例成分,並依嚴格的製作步製成重鉻酸明膠全像片外,並採用不同角度重覆曝光方式改良干涉式波帶板無法自動追蹤的缺點,經過多次試驗與改進,藉以形成具備高繞射效率和自動追蹤功能的全像光學波帶板。Since the starry heaven is rotating from east to west, exposure time has to be limited in order to obtain a point image. the limiting exposures are as follows
由於星空不斷由東向西轉動,若要保持星點在底片上呈點狀,最長曝光時間如下:
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