Automatic lens meter
First Claim
1. An automatic lens meter comprising:
- a projection optical system for projecting at least one light beam onto a lens to be tested, said lens held at a predetermined position in the direction of an optical axis;
a receiving optical system comprising a light position detector, said receiving optical system receiving light beams related to said at least one light beam and transmitted through the lens to be tested on said light-position detector;
calculation means for calculating a diopter value and an eccentricity of the lens to be tested from the position of the transmitted light beams on said light-position detector;
time measuring means for measuring the time during which said eccentricity is within a predetermined range; and
display means for displaying said diopter value of the lens to be tested when the time during which the eccentricity is within a predetermined range exceeds a predetermined time.
1 Assignment
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Accused Products
Abstract
An automatic lens meter includes a projection optical system for projecting light beams onto a lens to be tested. The lens is held at a predetermined position in the direction of an optical axis. The meter also includes a receiving optical system having a light position detector. The receiving optical system receives light beams transmitted through the lens to be tested on the light-position detector. The meter further includes a calculator for calculating a diopter value and an eccentricity of the lens to be tested from the position of the tranmitted light beams on the light-position detector, a timer for measuring the time during which the eccentricity is within a predetermined range, and a display device for displaying the diopter value of the lens to be tested when the time during which the eccentricity is within a predetermined range exceeds a predetermined time.
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Citations
11 Claims
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1. An automatic lens meter comprising:
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a projection optical system for projecting at least one light beam onto a lens to be tested, said lens held at a predetermined position in the direction of an optical axis; a receiving optical system comprising a light position detector, said receiving optical system receiving light beams related to said at least one light beam and transmitted through the lens to be tested on said light-position detector; calculation means for calculating a diopter value and an eccentricity of the lens to be tested from the position of the transmitted light beams on said light-position detector; time measuring means for measuring the time during which said eccentricity is within a predetermined range; and display means for displaying said diopter value of the lens to be tested when the time during which the eccentricity is within a predetermined range exceeds a predetermined time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An automatic lens meter comprising:
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a projection optical system for projecting at least one light beam onto a lens to be tested, said lens held at a predetermined position in the direction of an optical axis; a receiving optical system comprising a light position detector, said receiving optical system receiving light beams related to said at least one light beam and transmitted through the lens to be tested on said light-position detector; calculation means for calculating a diopter value and an eccentricity of the lens to be tested from the position of the transmitted light beams on said light-position detector; time measuring means for measuring the time during which said eccentricity is within a predetermined range; and register means for registering said diopter value of the lens to be tested when the time during which the eccentricity is within a predetermined range exceeds a predetermined time. - View Dependent Claims (11)
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Specification