FR2301033A2 - Slide projector optical system for fading in - using condenser and objective lenses with angled optical axes - Google Patents

Slide projector optical system for fading in - using condenser and objective lenses with angled optical axes

Info

Publication number
FR2301033A2
FR2301033A2 FR7504352A FR7504352A FR2301033A2 FR 2301033 A2 FR2301033 A2 FR 2301033A2 FR 7504352 A FR7504352 A FR 7504352A FR 7504352 A FR7504352 A FR 7504352A FR 2301033 A2 FR2301033 A2 FR 2301033A2
Authority
FR
France
Prior art keywords
fading
optical axes
condenser
optical system
slide projector
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.)
Pending
Application number
FR7504352A
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.)
Gefitec SA
Original Assignee
Gefitec SA
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 Gefitec SA filed Critical Gefitec SA
Priority to FR7504352A priority Critical patent/FR2301033A2/en
Publication of FR2301033A2 publication Critical patent/FR2301033A2/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B23/00—Devices for changing pictures in viewing apparatus or projectors
    • G03B23/18—Devices for changing pictures in viewing apparatus or projectors with fade-in and fade-out effects

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lenses (AREA)

Abstract

The slide projector optical system is used for fading- in and includes a single light source (2), a condenser lens (3) and an objective lens (5) with their optical axes at an angle to one another, two guides (7, 8) for the slide supports two total internal reflection elements (13, 14) and two semi-reflecting mirrors (11, 16). The latter are positioned parallel to one another and at 45 degrees to the two optical axes, the first mirror (11) lying on the axis of the condenser lens between the two total internal reflection elements (13, 14). The second mirror (16) is positioned facing the first total internal reflection element (13), so that the light from the source (2) follows two Z paths. The two guides (7, 8) for the slide supports are centred perpendicularly on the two Z paths, such that their respective distances to the focus of the objective are equal.
FR7504352A 1975-02-12 1975-02-12 Slide projector optical system for fading in - using condenser and objective lenses with angled optical axes Pending FR2301033A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7504352A FR2301033A2 (en) 1975-02-12 1975-02-12 Slide projector optical system for fading in - using condenser and objective lenses with angled optical axes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7504352A FR2301033A2 (en) 1975-02-12 1975-02-12 Slide projector optical system for fading in - using condenser and objective lenses with angled optical axes

Publications (1)

Publication Number Publication Date
FR2301033A2 true FR2301033A2 (en) 1976-09-10

Family

ID=9151111

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7504352A Pending FR2301033A2 (en) 1975-02-12 1975-02-12 Slide projector optical system for fading in - using condenser and objective lenses with angled optical axes

Country Status (1)

Country Link
FR (1) FR2301033A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504695A1 (en) * 1981-04-27 1982-10-29 Macresy Creations Simon Sarl Method of colour blending transparencies - has two protectors on to one surface which is both partly reflective and progressively transparent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504695A1 (en) * 1981-04-27 1982-10-29 Macresy Creations Simon Sarl Method of colour blending transparencies - has two protectors on to one surface which is both partly reflective and progressively transparent

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