GB1427030A - Lens measuring apparatus - Google Patents
Lens measuring apparatusInfo
- Publication number
- GB1427030A GB1427030A GB6010372A GB6010372A GB1427030A GB 1427030 A GB1427030 A GB 1427030A GB 6010372 A GB6010372 A GB 6010372A GB 6010372 A GB6010372 A GB 6010372A GB 1427030 A GB1427030 A GB 1427030A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- tube
- probe
- dec
- curvature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
- G01B5/213—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures for measuring radius of curvature
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
1427030 Measuring lenses CONTACT LENSES (MFG) CO Ltd 28 Dec 1973 [29 Dec 1972] 60103/72 Heading G1M The curvature of a contact lens of soft hydrophilic material is measured while the lens is immersed in water or saline solution by means of an apparatus comprising a vessel 11 having a transparent wall 11 A, a vertical tube 12 having a horizontal upper surface 21 for supporting the lens and a vertical probe 14 movable vertically by means of a micrometer screw 13. A sealing ring 17 is provided between the probe 14 and tube 12. In use, the probe is adjusted to a position in which its tip is level with the top of tube 12 with the aid of eye-piece 18. The lens is placed in position and the probe adjusted to touch the lens. For a convex lens, the tube 12 may be transparent. The tube 12 may be provided with a frusto-conical surface portion 20 at its top inside and/or outside its wall. Micrometer screw 13 may be calibrated in terms of lens curvature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6010372A GB1427030A (en) | 1972-12-29 | 1972-12-29 | Lens measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6010372A GB1427030A (en) | 1972-12-29 | 1972-12-29 | Lens measuring apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1427030A true GB1427030A (en) | 1976-03-03 |
Family
ID=10485013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6010372A Expired GB1427030A (en) | 1972-12-29 | 1972-12-29 | Lens measuring apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1427030A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2404831A1 (en) * | 1977-09-30 | 1979-04-27 | Ceskoslovenska Akademie Ved | DETERMINATION OF SAGITTAL DEPTH AND AVERAGE CENTRAL CURVATURE OF CONTACT LENSES IN GELATINE MATERIAL |
WO1986003286A1 (en) * | 1984-11-20 | 1986-06-05 | Michael Wodis | Contact lens analyzing apparatus |
-
1972
- 1972-12-29 GB GB6010372A patent/GB1427030A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2404831A1 (en) * | 1977-09-30 | 1979-04-27 | Ceskoslovenska Akademie Ved | DETERMINATION OF SAGITTAL DEPTH AND AVERAGE CENTRAL CURVATURE OF CONTACT LENSES IN GELATINE MATERIAL |
WO1986003286A1 (en) * | 1984-11-20 | 1986-06-05 | Michael Wodis | Contact lens analyzing apparatus |
US4665624A (en) * | 1984-11-20 | 1987-05-19 | Michael Wodis | Contact lens analyzing apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |