发明名称 APPARATUS TO FOCUS LIGHT ON SURFACE
摘要 Focus control apparatus in which a focusing means of appreciable chromatic aberration is used (eg a zone plate). Focusing is achieved by varying the wavelength of light falling on the focusing means. This is achieved in three ways i) actually varying the light source ii) using a prism (16, Fig. 1) to pick out certain wavelengths iii) using an interference wedge. Application in video recorders and endoscopes mentioned. <IMAGE>
申请公布号 GB8332364(D0) 申请公布日期 1984.01.11
申请号 GB19830032364 申请日期 1983.12.05
申请人 SECRETARY OF STATE FOR TRADE & INDUSTRY 发明人
分类号 A61B1/00;G02B7/34;G11B7/09 主分类号 A61B1/00
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