GB729259A - Improvements in or relating to optical systems - Google Patents

Improvements in or relating to optical systems

Info

Publication number
GB729259A
GB729259A GB8926/53A GB892653A GB729259A GB 729259 A GB729259 A GB 729259A GB 8926/53 A GB8926/53 A GB 8926/53A GB 892653 A GB892653 A GB 892653A GB 729259 A GB729259 A GB 729259A
Authority
GB
United Kingdom
Prior art keywords
light
reflectors
objectives
lens
image
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
GB8926/53A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB729259A publication Critical patent/GB729259A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/22—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

729,259. Optical systems. RADIO CORPORATION OF AMERICA. March 31, 1953 [April 21, 1952], No. 8926/53. Class 97 (1). In an optical system having a plurality of objectives selectively positionable on the axis of the system to form an image of an object upon an image plane, an optical image-relaying system is placed between the said plane and the objective and includes means for controlling the intensity of the light passing to the image plane. The invention is described with reference to the three-colour television system shown which includes light-sensitive tubes 21, 22, 23 on which differently coloured images are formed by light from one of a number of objectives 12, 13, 14 divided by crossed dichroic reflectors 24. The objectives are mounted on a rotatable turret 11 and each is associated with a field lens 16, 17, 18, light from which passes to reflectors 27 inclined to the beam to correct astigmatic errors introduced by the dichroic reflectors 24. Light from the reflectors is collimated by a lens 19 and passed to a lens 20 forming the images on the tubes 21, 22, 23. Between these lenses is an iris diaphragm 28 adjustable from a distance by an electric motor 32 and which also operates a gear 37 moving a variable resistance 39 by which an indication of the size of the diaphragm aperture is given on an ammeter 44. In addition to or instead of the iris diaphragm a pair of rotatable or linearly movable density wedges may be provided between the lenses 19 and 20.
GB8926/53A 1952-04-21 1953-03-31 Improvements in or relating to optical systems Expired GB729259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US729259XA 1952-04-21 1952-04-21

Publications (1)

Publication Number Publication Date
GB729259A true GB729259A (en) 1955-05-04

Family

ID=22110585

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8926/53A Expired GB729259A (en) 1952-04-21 1953-03-31 Improvements in or relating to optical systems

Country Status (1)

Country Link
GB (1) GB729259A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952188A (en) * 1958-03-14 1960-09-13 Bendix Corp Light filter for television pickup tubes and the like
WO1984002090A1 (en) * 1982-11-20 1984-06-07 Thomas Paterson Whitehead Dispensing device and recording apparatus
GB2163865A (en) * 1984-08-30 1986-03-05 Rank Cintel Ltd Apparatus for individually processing optical images of different wavelengths

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952188A (en) * 1958-03-14 1960-09-13 Bendix Corp Light filter for television pickup tubes and the like
WO1984002090A1 (en) * 1982-11-20 1984-06-07 Thomas Paterson Whitehead Dispensing device and recording apparatus
EP0110610A2 (en) * 1982-11-20 1984-06-13 The University Of Birmingham Dispensing device and recording apparatus
EP0110610A3 (en) * 1982-11-20 1984-09-12 Thomas Paterson Whitehead Dispensing device and recording apparatus
US4593728A (en) * 1982-11-20 1986-06-10 Whitehead Thomas P Dispensing device and recording apparatus
EP0207532A2 (en) * 1982-11-20 1987-01-07 The University Of Birmingham Recording Apparatus
EP0207532A3 (en) * 1982-11-20 1987-07-01 Thomas Paterson Whitehead Recording apparatus
US4879097A (en) * 1982-11-20 1989-11-07 Whitehead Thomas P Dispensing device and recording apparatus
GB2163865A (en) * 1984-08-30 1986-03-05 Rank Cintel Ltd Apparatus for individually processing optical images of different wavelengths

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