GB478557A - Improvements in or relating to polarising devices - Google Patents

Improvements in or relating to polarising devices

Info

Publication number
GB478557A
GB478557A GB21726/37A GB2172637A GB478557A GB 478557 A GB478557 A GB 478557A GB 21726/37 A GB21726/37 A GB 21726/37A GB 2172637 A GB2172637 A GB 2172637A GB 478557 A GB478557 A GB 478557A
Authority
GB
United Kingdom
Prior art keywords
filter
plane
polarizing
aug
sinker
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
Application number
GB21726/37A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zeiss Ikon AG filed Critical Zeiss Ikon AG
Publication of GB478557A publication Critical patent/GB478557A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state

Abstract

478,557. Polarizing-apparatus. ZEISS IKON AKT.-GES. Aug. 6, 1937, Nos. 21726, 21727, and 21728. Convention dates, Aug. 6, 1936, Aug. 7, 1936, and Feb. 5, 1937. [Class 97 (i)] A polarizing-filter, particularly intended for testing the setting of polarizing-screens fitted to motor-vehicle headlamps, has means for indicating when, or ensuring that, the plane of polarization of the filter makes a predetermined angle with a fixed plane of reference when the optical axis of the filter is set in or parallel to the said plane. In Figs. 1 and 2 the filter 1 is mounted between cover glasses 2, 3 so shaped as to form between them an arcuate channel 4 in which is disposed a metal ball &c. 5, the position of which can be read on a scale 6 on one of the cover glasses. The plane of polarization of the filter is in the desired direction when the ball is opposite the zero of the scale. In Fig. 6, the filter 10 is freely suspended in a liquid 13 contained between glass discs 11, 12 and is weighted by a sinker 15 so that it always takes up a position in which the diameter of the filter passing through the sinker is vertical.
GB21726/37A 1936-08-06 1937-08-06 Improvements in or relating to polarising devices Expired GB478557A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE478557X 1936-08-06

Publications (1)

Publication Number Publication Date
GB478557A true GB478557A (en) 1938-01-20

Family

ID=6542270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21726/37A Expired GB478557A (en) 1936-08-06 1937-08-06 Improvements in or relating to polarising devices

Country Status (1)

Country Link
GB (1) GB478557A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427259A (en) * 1945-08-27 1947-09-09 Polaroid Corp Jig for predeterminedly marking polarizing screens with respect to their transmission axes
US2469795A (en) * 1947-01-14 1949-05-10 Byron P Sproul Polarizing filter attachment for cameras
DE940087C (en) * 1950-11-04 1956-03-08 Hugo Dr Bergerhoff Film transport device for roll film cameras
US3279878A (en) * 1964-04-20 1966-10-18 Plastic Contact Lens Company Bi-focal corneal contact lens

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427259A (en) * 1945-08-27 1947-09-09 Polaroid Corp Jig for predeterminedly marking polarizing screens with respect to their transmission axes
US2469795A (en) * 1947-01-14 1949-05-10 Byron P Sproul Polarizing filter attachment for cameras
DE940087C (en) * 1950-11-04 1956-03-08 Hugo Dr Bergerhoff Film transport device for roll film cameras
US3279878A (en) * 1964-04-20 1966-10-18 Plastic Contact Lens Company Bi-focal corneal contact lens

Similar Documents

Publication Publication Date Title
FR65462E (en) Optical indicating device for electrical voltages, in particular for indicating tuning in t.s.f.
GB478557A (en) Improvements in or relating to polarising devices
GB522357A (en) Improvements in and relating to cases or containers for spectacles, eye-glasses and the like sight improving or correcting devices
GB445312A (en) Improvements in and relating to compasses
GB507737A (en) Improvements in hardness testing instruments
GB478539A (en) Improvements in or relating to mountings for polarising filters for photographic purposes
GB314994A (en) Improvements in refractometers for liquids
FR774880A (en) Simplified assembly device for unbreakable glass
FR808725A (en) Balance spring device for watch movements and other watch mechanisms
SU21930A1 (en) Pocket microscope
GB509940A (en) Improvements in or relating to magnetic compass devices
GB355242A (en) An improved instrument for determining the magnetic meridian
GB458474A (en) Improvements in means for indicating the brake efficiency of motor vehicles
GB501737A (en) Sighting instrument for determining altitudes
GB375731A (en) Improvements in or relating to microscopes
GB257507A (en) Improvements in anti-glare devices
FR1329532A (en) Device for facilitating observation by means of spectacles, binoculars or other optical sighting or observation devices
GB373795A (en) Improvements in or relating to gramophones and the like
KEPRT Possibilities of limiting the accommodation range of the eye, with particular reference to the increase of the adjustment accuracy of optico-mechanical instruments(Eye accommodation range limiting for increased adjustment accuracy of optico-mechanical instruments, considering spectacle lens, telescope, magnifying glass and microscope)
GB393590A (en) A diffraction erythrocytometer
FR839397A (en) Elastic device usable in particular for the suspension of vehicles
GB517245A (en) Indicating or recording device for magnetic field balances
GB865486A (en) Improvements in or relating to lens supports for vertex refraction meters
FR838408A (en) Method and device for adjusting watch glasses
FR807282A (en) Device for elastic suspension of light vehicles