GB236338A - - Google Patents
Info
- Publication number
- GB236338A GB236338A GB16489/25A GB1648925A GB236338A GB 236338 A GB236338 A GB 236338A GB 16489/25 A GB16489/25 A GB 16489/25A GB 1648925 A GB1648925 A GB 1648925A GB 236338 A GB236338 A GB 236338A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- mark
- variable
- lens system
- plano
- 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
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0257—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested
Landscapes
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Eyeglasses (AREA)
Abstract
236,338. Zeiss, C. [Firm of]. July 26, 1924, [Convention date]. Testing-apparatus. - In apparatus for testing prismatic lens systems in which a collective lens system k, i is used in conjunction with the lens system l to be tested serves to image a mark h<1> for observation by an optical system n<1>, n<2>, the prismatic effect of the svstem l is eliminated' by the insertion into the path of the rays of a prism, the refractive angle of which may be variable. In the apparatus described which is of the character of the apparatus described in Specification 12100/14, the variable angle prism consists of a plano-convex lens q<1> and a plano-concave lens q<2>, of which the latter is mounted so that it mav be rotated about the common centre of the curved surfaces of the two lenses giving the plane surfaces of the lenses a variable inclination to each other. The extent of the rotation necessary to restore the deflected image of the mark h<1> to its position in coincidence, with that of the mark i<1> in the eyepiece n<2> is indicated on the drum scale r<4> and is a measure of the prismatic effect of the lens system l.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE236338X | 1924-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB236338A true GB236338A (en) | 1925-07-16 |
Family
ID=5901318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16489/25A Expired GB236338A (en) | 1924-07-26 | 1925-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB236338A (en) |
-
1925
- 1925-06-26 GB GB16489/25A patent/GB236338A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB200488A (en) | ||
| US1735108A (en) | Optical adjusting device | |
| US1918540A (en) | Instrument for measuring the curvature of the cornea | |
| GB236338A (en) | ||
| GB1460158A (en) | Instrument for determining the characteristics of a lens | |
| US2107553A (en) | Ophthalmic instrument | |
| GB430836A (en) | Improvements in apparatus for the determination of the refraction of the eye | |
| US1475698A (en) | Apparatus for the objective measurement of the refractive value of the principal point of the eye | |
| US1483786A (en) | Optical instrument | |
| GB963094A (en) | Improvements in or relating to ophthalmometers | |
| US1495481A (en) | Apparatus for measuring the refractive value of the principal point of the eye | |
| GB274798A (en) | Improvements in tacheometric telescopes | |
| SU79150A1 (en) | Optical spherometer | |
| SU142056A1 (en) | Ophthalmometer | |
| SU110442A1 (en) | Device for measuring the contrast of objects | |
| SU2038A1 (en) | Rangefinder with constant base | |
| SU115930A1 (en) | Lens Centering Device | |
| US1826844A (en) | Telescopic instrument for subjective determination of the refraction of the eye | |
| SU74777A1 (en) | Lighting glass plate | |
| GB865361A (en) | Improvements in optical apparatus for testing the human eye | |
| SU1150509A1 (en) | Device for measuring posterior vertex refraction of glass lenses | |
| GB357931A (en) | Improvements in methods and instruments for measuring the curvature of the cornea | |
| SU88246A1 (en) | Aberrometer for measuring angular spherical aberrations | |
| GB148754A (en) | Improvements in apparatus for the objective measurement of the refractive value of the principal point of the eye | |
| SU67224A1 (en) | Method and instrument for measuring aberration and focusing by zones of collimator type optical systems |