Optical transducers of high sensitivity
First Claim
1. An optical transducer, comprising:
- a base member;
a light source carried on a face of said base member;
a light detector carried on said face of the base member;
a displaceable member overlying and spaced from said light source and light detector and effective to reflect light from said light source to said light detector; and
a light shielding means effective to shield said light detector from exposure to said light source except for the light reflected by said displaceable member from the light source to the light detector;
wherein said light detector is configured to substantially surround all sides of said light source such as to receive light emitted in substantially all directions from said light source for reflection to the light detector by said displaceable member;
wherein said light source includes a plurality of discrete light-generating elements carried on a face of said light detector;
said light detector including surfaces in the spaces between said discrete light-generating elements;
said light shielding means including a light blocking layer around each of said discrete light-generating elements such as to shield said light detector surfaces from all said discrete light-generating elements except for the light reflected by said displaceable member.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical transducer includes a base member, a light source carried on a face of the base member, a light detector carried on the face of the base member, a displaceable member overlying and spaced from the light source and light detector and effective to reflect light from the light source to the light detector, and light shielding means effective to shield the light detector from exposure to the light source except for the light reflected by the displaceable member from the light source to the light detector. The light detector is configured to substantially surround the light source such as to receive light emitted in substantially all directions from the light source for reflection to the light detector by the displaceable member.
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Citations
11 Claims
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1. An optical transducer, comprising:
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a base member;
a light source carried on a face of said base member;
a light detector carried on said face of the base member;
a displaceable member overlying and spaced from said light source and light detector and effective to reflect light from said light source to said light detector; and
a light shielding means effective to shield said light detector from exposure to said light source except for the light reflected by said displaceable member from the light source to the light detector;
wherein said light detector is configured to substantially surround all sides of said light source such as to receive light emitted in substantially all directions from said light source for reflection to the light detector by said displaceable member;
wherein said light source includes a plurality of discrete light-generating elements carried on a face of said light detector;
said light detector including surfaces in the spaces between said discrete light-generating elements;
said light shielding means including a light blocking layer around each of said discrete light-generating elements such as to shield said light detector surfaces from all said discrete light-generating elements except for the light reflected by said displaceable member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification