US4040746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical congruence comparator
Assignee: Robert Bosch GmbH
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Filing: 1976-07-21
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Granted: 1977-08-09
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Expires: 1996-07-21
Abstract
Abstract To prevent spurious distortion of the image upon mechanical distortion of a cross slide upon movement of the cross slide, a slide carrier is arranged to support the objects to be compared in superposed relation; a microscope optic and deflection optics form superimposed images of the respective objects, the microscope optics including two channels which have objective planes parallel to the imaging planes for measuring the objects. In accordance with the invention, the focal length of the microscope objective in one channel is equal to one-half the distance of the superimposed corresponding elemental areas of the objects to be compared, the optic generating an image of the areas to be compared which is at, or close to infinity. A plane mirror is rigidly connected to the carrier, the mirror plane thereof extending parallel to the imaging planes, so that small rotary distortion of the carrier will not interfere with congruence of corresponding elemental areas.
Inventors
- 👤 Christian Lietar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:42
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/04; G01B11/00; G01B11/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
181 words
Optical congruence comparator to compare the outlined dimensions, in respective image planes of two objects (6, 6') comprising a slide carrier (5) supporting said objects (6, 6') in superposed alignment with respect to a line perpendicular to said planes; a microscope optic (7-10; 7'-10', 10"; 11-13) forming superposed images of said respective objects and including two objective channels (7, 7') having objective planes parallel to said imaging planes, wherein the focal length of the microscope objective in one channel (7) is equal to one-half the distance (H) of separation of corresponding elemental area (A, A'), zones or points of the objects to be compared and the microscope optic generates an image of the areas, zones or points to be compared at, or close to essentially infinity; and a plane mirror (14) fixedly connected to said carrier (5) and having a mirror plane (14a) which extends parallel to said imaging planes so that small rotary distortion of the carrier will not interfere with congruence of corresponding elemental areas, zones or points of the respective objects (6, 6') in the superposed microscope images.
Claim 2
Dependent Claim
181 words
Optical congruence comparator to compare the outlined dimensions, in respective image planes of two objects (6, 6') comprising a slide carrier (5) supporting said objects (6, 6') in superposed alignment with respect to a line perpendicular to said planes; a microscope optic (7-10; 7'-10', 10"; 11-13) forming superposed images of said respective objects and including two objective channels (7, 7') having objective planes parallel to said imaging planes, wherein the focal length of the microscope objective in one channel (7) is equal to one-half the distance (H) of separation of corresponding elemental area (A, A'), zones or points of the objects to be compared and the microscope optic generates an image of the areas, zones or points to be compared at, or close to essentially infinity; and a plane mirror (14) fixedly connected to said carrier (5) and having a mirror plane (14a) which extends parallel to said imaging planes so that small rotary distortion of the carrier will not interfere with congruence of corresponding elemental areas, zones or points of the respective objects (6, 6') in the superposed microscope images.
Claim 3
Dependent Claim
21 words
Comparator according to claim 1, wherein an optical reversal system (15a, 15b) is provided, included in one channel of the channels.
Claim 4
Dependent Claim
18 words
Comparator according to claim 2, wherein the optical reversal system comprises a Porro-prism of first order (15a, 15b).
Claim 5
Dependent Claim
25 words
Comparator according to claim 1, wherein the mirror plane (14a) is perpendicular to the optical axis of the associated objective (7) of the microscope optic.
Claim 6
Dependent Claim
41 words
Comparator according to claim 1, further comprising optical enlarging-reducing means (9) included in the channel of the microscope optic which has said plane mirror (14) fixedly connected to the carrier (5) therein to change the imaging scale of the microscope optic.
Claim 7
Dependent Claim
20 words
Comparator according to claim 5, wherein the enlarging-reducing optics (9) comprises an auxiliary objective (9) having a variable focal length.
Claim 8
Dependent Claim
26 words
Comparator according to claim 5, wherein the enlarging-reducing optics comprises auxiliary objectives of variable focal length selectively positionable in the optical path of said respective channel.
References Cited (Backward Citations)
US2950649A
Cited
US3667848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |