FR2349844A1 - Lens hood for laser beam objectives - prevents deposition of evaporated materials on the front surface of the objective - Google Patents

Lens hood for laser beam objectives - prevents deposition of evaporated materials on the front surface of the objective

Info

Publication number
FR2349844A1
FR2349844A1 FR7712727A FR7712727A FR2349844A1 FR 2349844 A1 FR2349844 A1 FR 2349844A1 FR 7712727 A FR7712727 A FR 7712727A FR 7712727 A FR7712727 A FR 7712727A FR 2349844 A1 FR2349844 A1 FR 2349844A1
Authority
FR
France
Prior art keywords
objective
housing
front surface
laser beam
aperture
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.)
Granted
Application number
FR7712727A
Other languages
French (fr)
Other versions
FR2349844B3 (en
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.)
Jenoptik AG
Original Assignee
Carl Zeiss Jena GmbH
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 Carl Zeiss Jena GmbH filed Critical Carl Zeiss Jena GmbH
Publication of FR2349844A1 publication Critical patent/FR2349844A1/en
Application granted granted Critical
Publication of FR2349844B3 publication Critical patent/FR2349844B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
    • G01N21/718—Laser microanalysis, i.e. with formation of sample plasma

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pathology (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optical Measuring Cells (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Lens Barrels (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

Adaptor for reducing the amt. of material vapour deposited on and dirtying an objective used for beam focussing is claimed, esp. during microspectral analysis using a laser beam or in the laser machining of materials. The novelty is that the front surface of the objective is provided with a housing leading to an aperture through which the beam passes; and the bore of the aperture has a tooth-shaped profile. The bore of the aperture pref. increases towards the interior of the housing, and a ring may be located at the larger end of the hole in the housing. A cooling device may be fitted on the housing. When dirt is deposited on the laser objective, reproducible results cannot be obtd. in either spectral analysis or laser cutting. The invention avoids these problems.
FR7712727A 1976-04-29 1977-04-27 Lens hood for laser beam objectives - prevents deposition of evaporated materials on the front surface of the objective Granted FR2349844A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD19258576A DD125703A1 (en) 1976-04-29 1976-04-29 VES FOR RAY FOCUSING THROUGH MATERIAL DAMAGES

Publications (2)

Publication Number Publication Date
FR2349844A1 true FR2349844A1 (en) 1977-11-25
FR2349844B3 FR2349844B3 (en) 1980-12-19

Family

ID=5504357

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7712727A Granted FR2349844A1 (en) 1976-04-29 1977-04-27 Lens hood for laser beam objectives - prevents deposition of evaporated materials on the front surface of the objective

Country Status (4)

Country Link
JP (1) JPS52133223A (en)
DD (1) DD125703A1 (en)
DE (1) DE2650123A1 (en)
FR (1) FR2349844A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997608U (en) * 1982-12-20 1984-07-02 株式会社ナムコ wallet
DE102009008232A1 (en) 2009-02-10 2010-08-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device and method for connecting an optical measuring device to a measuring volume
FI20155549L (en) * 2015-07-10 2017-01-11 Outotec Finland Oy METHOD AND APPARATUS FOR OPTICAL RADIATION SPECTROSCOPY OF FLUIDS
DE102018102828B4 (en) * 2018-02-08 2020-03-12 Scansonic Mi Gmbh Protective glass monitoring method
DE202022104717U1 (en) 2022-08-19 2023-11-22 Hydro Aluminium Recycling Deutschland Gmbh System for analyzing and sorting a piece of material

Also Published As

Publication number Publication date
DD125703A1 (en) 1977-05-11
JPS5620521B2 (en) 1981-05-14
DE2650123A1 (en) 1977-11-17
JPS52133223A (en) 1977-11-08
FR2349844B3 (en) 1980-12-19

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Legal Events

Date Code Title Description
ST Notification of lapse