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GB1174325A - Improvements in and relating to Preventing the Formation of Striae on Windows. - Google Patents

Improvements in and relating to Preventing the Formation of Striae on Windows.

Info

Publication number
GB1174325A
GB1174325A GB32076/67A GB3207667A GB1174325A GB 1174325 A GB1174325 A GB 1174325A GB 32076/67 A GB32076/67 A GB 32076/67A GB 3207667 A GB3207667 A GB 3207667A GB 1174325 A GB1174325 A GB 1174325A
Authority
GB
United Kingdom
Prior art keywords
window
covered
annular slot
observation
nozzle
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
GB32076/67A
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.)
Rheinmetall Air Defence AG
Original Assignee
Oerlikon Contraves 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 Oerlikon Contraves AG filed Critical Oerlikon Contraves AG
Publication of GB1174325A publication Critical patent/GB1174325A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B08B17/02—Preventing deposition of fouling or of dust

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)
  • Optical Measuring Cells (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Radiation Pyrometers (AREA)

Abstract

1,174,325. Optical apparatus. CONTRAVES A.G. July 12, 1967 [Aug.15, 1966], No.32076/67. Heading G2J. To improve the visibility in optical observation or surveying instruments, particularly for tracking flying bodies at large distances, by preventing the formation of large striae on a window 20, Fig.2, with a temperature drop across it, an annular slot, which may be covered by a filter strip 23, is connected by a suction duct 24 to an aspiration device, so that a flow of air, or other medium, is directed axially towards the window 20. As shown, the nozzle 22, in which the annular slot is provided, has a rounded entrance surface and is surrounded by an annular slot 25 which is also connected to the duct 24. Alternatively a flange may surround the nozzle. As applied to an observation instrument (50, Fig.4, not shown) mounted in an air conditioned dome housing (52) for rotation as a whole about a vertical axis (V), the dome housing (52) having a meridional slot covered by an arcuate cover (53) which partakes of the elevational motion of the observation tube (51) about the horizontal axis (H), the cover (53) has a window (40) aligned with the axis of tube (51) and provided on both sides with annular slots covered by filter strips (43, 43a) and connected to suction ducts (44, 44a).
GB32076/67A 1966-08-15 1967-07-12 Improvements in and relating to Preventing the Formation of Striae on Windows. Expired GB1174325A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1175866A CH444520A (en) 1966-08-15 1966-08-15 Method for preventing the formation of optically disturbing streaks on a window with a temperature jump to the adjacent room and device for carrying out this method

Publications (1)

Publication Number Publication Date
GB1174325A true GB1174325A (en) 1969-12-17

Family

ID=4376598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32076/67A Expired GB1174325A (en) 1966-08-15 1967-07-12 Improvements in and relating to Preventing the Formation of Striae on Windows.

Country Status (7)

Country Link
US (1) US3510193A (en)
CH (1) CH444520A (en)
DE (1) DE1572616B2 (en)
FR (1) FR1533820A (en)
GB (1) GB1174325A (en)
NL (1) NL6710190A (en)
SE (1) SE325721B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508181A1 (en) * 1981-06-19 1982-12-24 Sopelem SEALING DEVICE FOR AN OPTICAL INSTRUMENT
IL81190A (en) * 1987-01-07 1990-11-29 Scitex Corp Ltd Device for stabilization of beam intensity distribution in laser scanners
US4887779A (en) * 1987-12-01 1989-12-19 The Boeing Company Roll drum sensor housing having sliding window
EP2022670A3 (en) * 2003-02-13 2012-12-12 MacDougall, Craig Hart Front area viewing device for motor vehicles
US8444330B2 (en) * 2010-10-08 2013-05-21 Mori Seiki Co., Ltd. In-magazine imaging device enclosure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118231A (en) * 1964-01-21 Rathsmill
US3103712A (en) * 1961-05-23 1963-09-17 Allinikov Sidney High temperature resistant viewing device
US3310356A (en) * 1963-02-08 1967-03-21 Gen Precision Inc Lens protective device utilizing dual air streams

Also Published As

Publication number Publication date
US3510193A (en) 1970-05-05
DE1572616A1 (en) 1970-07-30
NL6710190A (en) 1968-02-16
SE325721B (en) 1970-07-06
CH444520A (en) 1967-09-30
DE1572616B2 (en) 1971-10-28
FR1533820A (en) 1968-07-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees