FR997575A - Improvement in fronto-focometers - Google Patents

Improvement in fronto-focometers

Info

Publication number
FR997575A
FR997575A FR997575DA FR997575A FR 997575 A FR997575 A FR 997575A FR 997575D A FR997575D A FR 997575DA FR 997575 A FR997575 A FR 997575A
Authority
FR
France
Prior art keywords
focometers
fronto
improvement
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.)
Societe de Recherches et de Perfectionnements Industriels SRPI
Original Assignee
Societe de Recherches et de Perfectionnements Industriels SRPI
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 Societe de Recherches et de Perfectionnements Industriels SRPI filed Critical Societe de Recherches et de Perfectionnements Industriels SRPI
Application granted granted Critical
Publication of FR997575A publication Critical patent/FR997575A/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
    • G01M11/02—Testing optical properties
    • G01M11/0228—Testing optical properties by measuring refractive power
FR997575D 1949-09-23 1949-09-23 Improvement in fronto-focometers Expired FR997575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR997575T 1949-09-23

Publications (1)

Publication Number Publication Date
FR997575A true FR997575A (en) 1952-01-08

Family

ID=9558782

Family Applications (1)

Application Number Title Priority Date Filing Date
FR997575D Expired FR997575A (en) 1949-09-23 1949-09-23 Improvement in fronto-focometers

Country Status (1)

Country Link
FR (1) FR997575A (en)

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