FR690413A - Improvements to light projection devices - Google Patents

Improvements to light projection devices

Info

Publication number
FR690413A
FR690413A FR690413DA FR690413A FR 690413 A FR690413 A FR 690413A FR 690413D A FR690413D A FR 690413DA FR 690413 A FR690413 A FR 690413A
Authority
FR
France
Prior art keywords
light projection
projection devices
devices
light
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)
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.)
STELMAR PROJECTION LIGHTING LT
Original Assignee
STELMAR PROJECTION LIGHTING LT
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 STELMAR PROJECTION LIGHTING LT filed Critical STELMAR PROJECTION LIGHTING LT
Application granted granted Critical
Publication of FR690413A publication Critical patent/FR690413A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR690413D 1930-02-21 1930-02-21 Improvements to light projection devices Expired FR690413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR690413T 1930-02-21

Publications (1)

Publication Number Publication Date
FR690413A true FR690413A (en) 1930-09-19

Family

ID=9029305

Family Applications (1)

Application Number Title Priority Date Filing Date
FR690413D Expired FR690413A (en) 1930-02-21 1930-02-21 Improvements to light projection devices

Country Status (1)

Country Link
FR (1) FR690413A (en)

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