FR57740E - Improvements to optical projection devices - Google Patents

Improvements to optical projection devices

Info

Publication number
FR57740E
FR57740E FR57740DA FR57740E FR 57740 E FR57740 E FR 57740E FR 57740D A FR57740D A FR 57740DA FR 57740 E FR57740 E FR 57740E
Authority
FR
France
Prior art keywords
optical projection
projection devices
devices
optical
projection
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)
Inventor
Percy Parsons Atkins
Francis Wippell May
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR57740E publication Critical patent/FR57740E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/0004—Microscopes specially adapted for specific applications
    • G02B21/0016—Technical microscopes, e.g. for inspection or measuring in industrial production processes

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR57740D 1947-10-17 1947-10-17 Improvements to optical projection devices Expired FR57740E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR57740T 1947-10-17

Publications (1)

Publication Number Publication Date
FR57740E true FR57740E (en) 1953-05-04

Family

ID=8691740

Family Applications (1)

Application Number Title Priority Date Filing Date
FR57740D Expired FR57740E (en) 1947-10-17 1947-10-17 Improvements to optical projection devices

Country Status (1)

Country Link
FR (1) FR57740E (en)

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