FR828057A - Improvements to light projection systems - Google Patents

Improvements to light projection systems

Info

Publication number
FR828057A
FR828057A FR828057DA FR828057A FR 828057 A FR828057 A FR 828057A FR 828057D A FR828057D A FR 828057DA FR 828057 A FR828057 A FR 828057A
Authority
FR
France
Prior art keywords
light projection
projection systems
systems
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.)
Research Corp
Original Assignee
Research 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 Research Corp filed Critical Research Corp
Application granted granted Critical
Publication of FR828057A publication Critical patent/FR828057A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/048—Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR828057D 1937-10-20 1937-10-20 Improvements to light projection systems Expired FR828057A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR828057T 1937-10-20

Publications (1)

Publication Number Publication Date
FR828057A true FR828057A (en) 1938-05-10

Family

ID=9283565

Family Applications (1)

Application Number Title Priority Date Filing Date
FR828057D Expired FR828057A (en) 1937-10-20 1937-10-20 Improvements to light projection systems

Country Status (1)

Country Link
FR (1) FR828057A (en)

Similar Documents

Publication Publication Date Title
FR819107A (en) Projector refinements
FR847855A (en) Improvements to aerial systems
FR831620A (en) Improvements to telephone systems
FR860035A (en) Improvements to braking systems
FR847965A (en) TV systems
FR863581A (en) Improvements to television systems
FR851173A (en) Improvements to modulation systems
FR828057A (en) Improvements to light projection systems
FR840325A (en) Improvements to telephone systems
FR933150A (en) Improvements to television systems
FR846979A (en) Improvements to television systems
FR841257A (en) Improvements to light reflection systems
FR49158E (en) Improvements to telephone systems
FR835343A (en) Improvements to electrical systems
FR837010A (en) Improvements to cinematographic projection devices
FR840443A (en) Modulator systems
FR822904A (en) Improvements to optical systems
FR832760A (en) Improvements to telegraph systems
FR847279A (en) Improvements to telephone systems
FR838511A (en) Improvements to telephone systems
FR758270A (en) Improvements to photosensitive systems
FR833192A (en) Improvements to light projectors
FR788090A (en) Improvements to light projection devices
FR827382A (en) Improvements to television systems
FR931429A (en) Improvements to radio-telegraph systems