发明名称 |
APPARATUS FOR THE POINT-BY-POINT SCANNING OF AN OBJECT |
摘要 |
An apparatus is described for point-by-point scanning of an object, which may be a phase object, an amplitude object or a combined amplitude and phase object. The object is scanned with a light, sound, electron or X-ray beam which is converged to a spot on the object. A pair of detectors disposed in the path of the modulated radiation coming from the object convert the variations in the radiation into corresponding electrical signals which are fed to a summing circuit. A variable phase shifter connected between at least one of the detectors and the summing circuit is used to introduce a phase shift in the electrical signal such as to optimize the output signal of the summing circuit for the type of object being scanned. |
申请公布号 |
GB2102235(B) |
申请公布日期 |
1985.01.30 |
申请号 |
GB19810031236 |
申请日期 |
1981.10.16 |
申请人 |
N V * PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
JOSEPHUS JOHANNES MARIA * BRAAT;GIJSBERTUS * BOUWHUIS |
分类号 |
H01J37/22;G01N23/22;G01N29/06;G02B21/00;G02B26/10;G11B7/13;G11B9/00;H01J37/244;H04N3/16;H04N7/18;(IPC1-7):G11B7/00 |
主分类号 |
H01J37/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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