Claims
- 1. In an apparatus for visualizing structure of an object by point-by-point scanning of the object, processing a signal obtained by said scanning so as to select and enhance a physical characteristic of said object, and displaying a selected characteristic, the structure comprising
- (a) radiation source means for supplying a radiation beam,
- (b) means for focusing said radiation beam into a radiation spot on an object,
- (c) means for scanning said radiation spot relative to said object,
- (d) radiation-sensitive detection means for converting radiation from said radiation spot on said object into two electrical signals, said detection means including two radiation-sensitive detectors, each of said detectors supplying one of said electrical signals, and
- (e) electronic processing means for processing said two electrical signals into a signal representing a physical characteristic of said object,
- wherein the improvement comprises said electronic processing means including in sequence:
- (1) circuit means for combining said two electrical signals into a composite signal identifying both an amplitude and a differential phase for each spot-like area of said object momentarily scanning by said scanning radiation spot,
- (2) circuit means for converting said composite signal for each area into a frequency spectrum of all scan areas of one scan line,
- (3) circuit means for filtering said frequency spectrum into a modified frequency spectrum,
- (4) circuit means for converting said modified frequency spectrum into a spatial signal representing a selected characteristic, and
- (5) circuit means for processing said spatial signals of a succession of scan lines into visual display signals.
- 2. An apparatus according to claim 1, wherein display means receiving said visual display signals is disposed for visually displaying said spatial signals.
- 3. An apparatus according to claim 1, wherein further circuit means are disposed in connection with said circuit means (1) for storing each of said electrical signals.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8702071 |
Sep 1987 |
NLX |
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Parent Case Info
This is a continuation of application Ser. No. 07/754,171, filed Nov. 29, 1990, now abandoned, which is a continuation of application Ser. No. 07/239,097, filed Aug. 31, 1988, now abandoned.
US Referenced Citations (5)
Continuations (2)
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Number |
Date |
Country |
Parent |
754171 |
Nov 1990 |
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Parent |
239097 |
Aug 1988 |
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