Electrical illumination and detecting apparatus
First Claim
1. An electrical illumination and detecting apparatus for indicating a property of an object, comprisinglight source means including light control means for illuminating at least a portion of the object with at least two different illumination conditions;
- image detector means responsive to light reflected from the object for generating at least two electrical image signals of the object corresponding to the different illumination conditions; and
means responsive to differences between the two electrical image signals for indicating a property of the object.
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Accused Products
Abstract
A light transmission unit, such as a liquid crystal cell, operated by an electronic control circuit is interposed in the illumination system of a viewing system for providing a plurality of selectable illumination or viewing conditions, such as transmissive illumination, incident illumination, oblique illuminations, differentially shaded illumination, dark field illumination, bright field illumination, phase contrast illumination, differential polarization illumination, and/or color illumination.
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Citations
21 Claims
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1. An electrical illumination and detecting apparatus for indicating a property of an object, comprising
light source means including light control means for illuminating at least a portion of the object with at least two different illumination conditions; -
image detector means responsive to light reflected from the object for generating at least two electrical image signals of the object corresponding to the different illumination conditions; and means responsive to differences between the two electrical image signals for indicating a property of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An electrical illumination and detecting apparatus for indicating a property of an object, comprising
light source means including light control means for illuminating at least a portion of the object with at least two different illumination conditions; -
image detector means responsive to light reflected from the object for generating a least two electrical image signals of the object corresponding to the different illumination conditions; and means responsive to the electrical image signals for indicating a property of the object; the object having a dimension parallel to the path of the reflected light from the object to the detector means; a first of the illumination conditions being with light directed oblique to the path of light from the object to the detector means so as to cast an area of shadow; a second of the illumination conditions being with light from a direction different from the first illumination condition so as to illuminate the area of the shadow; and said indicating means being responsive to the difference between the two electrical image signals corresponding to the shadow portion of the electrical image signal to determine the dimension of the object parallel to the path of light from the object to the detector means.
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20. An electrical radiant energy illuminating and detecting apparatus for determining a property of an object, comprising
radiant energy source means including control means for irradiating at least a portion of the object with at least two different irradiation conditions; -
image detector means responsive to radiation reflected from the object for generating at least first and second electrical image signals of the object corresponding to the different illumination conditions; differencing means for forming a third electrical image signal form the difference between the first and second signals; and means responsive to the third image signal for indicating a property of the object. - View Dependent Claims (21)
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Specification