FR888644A - Method and devices for testing and measuring the distortion of flat glasses and the like - Google Patents

Method and devices for testing and measuring the distortion of flat glasses and the like

Info

Publication number
FR888644A
FR888644A FR888644DA FR888644A FR 888644 A FR888644 A FR 888644A FR 888644D A FR888644D A FR 888644DA FR 888644 A FR888644 A FR 888644A
Authority
FR
France
Prior art keywords
distortion
testing
measuring
devices
flat glasses
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
Other languages
French (fr)
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.)
DEUTSCHEN GLASTECHNISCHEN GES
Original Assignee
DEUTSCHEN GLASTECHNISCHEN GES
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 DEUTSCHEN GLASTECHNISCHEN GES filed Critical DEUTSCHEN GLASTECHNISCHEN GES
Application granted granted Critical
Publication of FR888644A publication Critical patent/FR888644A/en
Expired legal-status Critical Current

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
FR888644D 1941-05-21 1942-11-27 Method and devices for testing and measuring the distortion of flat glasses and the like Expired FR888644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE888644T 1941-05-21

Publications (1)

Publication Number Publication Date
FR888644A true FR888644A (en) 1943-12-17

Family

ID=1556536

Family Applications (1)

Application Number Title Priority Date Filing Date
FR888644D Expired FR888644A (en) 1941-05-21 1942-11-27 Method and devices for testing and measuring the distortion of flat glasses and the like

Country Status (1)

Country Link
FR (1) FR888644A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541437A (en) * 1948-07-30 1951-02-13 Prescott Rochelle Apparatus for investigating optical refraction phenomena in gaseous media
US2642770A (en) * 1950-07-25 1953-06-23 Us Air Force Schlieren apparatus of improved optical quality
US2647434A (en) * 1950-07-25 1953-08-04 Theodor W Zobel Interferometer using liquid mirrors
US2735331A (en) * 1956-02-21 Apparatus for- optical inspection of glass sheets

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735331A (en) * 1956-02-21 Apparatus for- optical inspection of glass sheets
US2541437A (en) * 1948-07-30 1951-02-13 Prescott Rochelle Apparatus for investigating optical refraction phenomena in gaseous media
US2642770A (en) * 1950-07-25 1953-06-23 Us Air Force Schlieren apparatus of improved optical quality
US2647434A (en) * 1950-07-25 1953-08-04 Theodor W Zobel Interferometer using liquid mirrors

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