US3813169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining position and focus of an optical member
Assignee: Individual
•
Filing: 1973-01-02
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Granted: 1974-05-28
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Expires: 1993-01-02
Abstract
Abstract Apparatus for determining the alignment in the direction transverse of the optical axis of a lens and/or its focus. The apparatus includes a light beam generating means and means for providing output signals which indicate lateral or angular displacement of the optical axis of the lens with respect to the optimum axis or the axis of the apparatus and the focus or relation to the position of optimum focus of the lens. Another configuration provides means for accurately determining the magnification of an image produced by an optical system in addition to determination of optimum focus.
Inventors
- 👤 P Kaestner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:07
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/40
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
135 words
A device for determining the position of a test optical member in a direction perpendicular to an optical axis and for determining a focus point of said member comprising: source means to generate light radiation that passes through said test optical member and forms an image, which is received by a receiving means; said receiving means, which receives said image, generates electrical signals in response thereto; a predetermined focus point on said optical axis and a predetermined position for said test optical member perpendicular to said optical axis and a standard for receiving a portion of unpassed radiation and generating output signals which, when compared to the output signal of said receiving means, indicate the position of said test optical member with respect to said focus point of said member and said predetermined focus point.
Claim 2
Independent Claim
135 words
A device for determining the position of a test optical member in a direction perpendicular to an optical axis and for determining a focus point of said member comprising: source means to generate light radiation that passes through said test optical member and forms an image, which is received by a receiving means; said receiving means, which receives said image, generates electrical signals in response thereto; a predetermined focus point on said optical axis and a predetermined position for said test optical member perpendicular to said optical axis and a standard for receiving a portion of unpassed radiation and generating output signals which, when compared to the output signal of said receiving means, indicate the position of said test optical member with respect to said focus point of said member and said predetermined focus point.
Claim 3
Dependent Claim
38 words
The device of claim 1 including means comprising a plurality of slots positioned between the source means and the optical member and wherein the distance between images of the slots will indicate the magnification of the optical member.
Claim 4
Dependent Claim
40 words
The device of claim 2 wherein the signal of the receiving means comprises a repeating, fluctuating light flux pattern having a phase which when compared to the standard indicates the direction the optical means is displaced from the predetermined position.
Claim 5
Dependent Claim
25 words
The device of claim 3 wherein said receiving means is positioned for the radiation to pass therethrough in generating the repeating, fluctuating light flux pattern.
Claim 6
Dependent Claim
31 words
The device of claim 4 wherein said receiver and radiation generating means are located at a predetermined angular relationship with respect to each other, which angular relationship is less than 180*.
Claim 7
Dependent Claim
18 words
The device of claim 4 wherein said repeated fluctuating light flux pattern is produced by a rotatable chopper.
Claim 8
Dependent Claim
21 words
The device of claim 6 including means responsive to the output signal for repositioning said optical member to the predetermined position.
Claim 9
Dependent Claim
18 words
The device of claim 4 wherein said repeated fluctuating light flux pattern is produced by a moving grid.
Claim 10
Dependent Claim
64 words
The device of claim 8 wherein a beam splitter and reflecting means are provided, the beam splitter being positioned to direct the radiation from said means for generating radiation through the optical member towards said reflecting means, the reflecting means being positioned to reflect the radiation and direct the radiation through the optical member and through the beam splitter and onto the receiving means.
Claim 11
Dependent Claim
19 words
The device of claim 9 wherein the reflecting means comprises a mirror and the optical member comprises a lens.
Claim 12
Independent Claim
150 words
A device for determining the position of a test optical member in a direction perpendicular to an optical axis comprising: source means to generate light radiation that passes through said test optical member and forms an image, which is received by a receiving means; said receiving means receives said image and generates electrical signals in response thereto; a predetermined position for the optical member perpendicular to said optical axis and a standard for receiving a portion of unpassed radiation and generating output signals which when compared to the output signal of said receiving means indicate the position of said test optical member with respect to said predetermined position for said member, means positioned along the optical axis to rotate the image to a plurality of positions for said receiving means to determine the position of the oPtical member in any of the plurality of positions perpendicular to the optical axis.
Claim 13
Independent Claim
150 words
A device for determining the position of a test optical member in a direction perpendicular to an optical axis comprising: source means to generate light radiation that passes through said test optical member and forms an image, which is received by a receiving means; said receiving means receives said image and generates electrical signals in response thereto; a predetermined position for the optical member perpendicular to said optical axis and a standard for receiving a portion of unpassed radiation and generating output signals which when compared to the output signal of said receiving means indicate the position of said test optical member with respect to said predetermined position for said member, means positioned along the optical axis to rotate the image to a plurality of positions for said receiving means to determine the position of the oPtical member in any of the plurality of positions perpendicular to the optical axis.
Claim 14
Dependent Claim
21 words
The device of claim 11 wherein said receiving means is positioned for the radiation to pass therethrough in generating the signal.
Claim 15
Dependent Claim
40 words
The device of claim 12 wherein the signal of the receiving means comprises a repeating, fluctuating light flux pattern having a phase which when compared to the standard indicates the direction the optical means is displaced from the predetermined position.
Claim 16
Dependent Claim
64 words
The device of claim 13 wherein a beam splitter and reflecting means are provided, the beam splitter being positioned to direct the radiation from said means for generating radiation through the optical member towards said reflecting means, the reflecting means being positioned to reflect the radiation and direct the radiation through the optical member and through the beam splitter and onto the receiving means.
Claim 17
Dependent Claim
48 words
The device of claim 14 wherein said means to rotate the image comprises a prism which is positioned between said beam splitter and said lens and is mounted so that by rotating the prism alignment can be determined in more than one direction perpendicular to the optical axis.
Claim 18
Dependent Claim
12 words
The device of claim 15 wherein the prism comprises a Pechan prism.
Claim 19
Dependent Claim
12 words
The device of claim 15 wherein the prism comprises a delta prism.
Claim 20
Dependent Claim
12 words
The device of claim 15 wherein the prism comprises a dove prism.
Claim 21
Dependent Claim
71 words
The device of claim 9 wherein said reflecting means comprises a mirror having a central reflecting area and two side transmitting areas, and wherein the means for generating radiation includes a member having two slits, the radiation passing through the two slits and through the optical member to produce images on the reflecting means on each side of the central reflecting area to thereby determine the magnification of the optical member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |