GB742124A - Improvements in and relating to an optical epidiascopic outline projecting apparatus - Google Patents
Improvements in and relating to an optical epidiascopic outline projecting apparatusInfo
- Publication number
- GB742124A GB742124A GB8680/53A GB868053A GB742124A GB 742124 A GB742124 A GB 742124A GB 8680/53 A GB8680/53 A GB 8680/53A GB 868053 A GB868053 A GB 868053A GB 742124 A GB742124 A GB 742124A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirror
- objective
- illumination
- condenser
- light
- 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
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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
742,124. Optical-projection apparatus. SOC. GENEVOISE D'lNSTRUMENTS DE PHYSIQUE. March 30, 1953 [April 4, 1952], No. 8680/53. Class 97 (1). An object is illuminated episcopically through the projection objective, additional diascopic illumination being obtained if a pivoted mirror beyond the object is perpendicular to the axis. If the mirror is inclined no diascopic illumination is provided by light entering through the objective, but the light source may be moved to produce diascopic illumination only by light reflected from the mirror. One form is shown in two perpendicular vertical sections. A housing 1, containing lamp 3 with condenser 4, is carried at the end of a pivoted arm 2 in the lower position B, of which it is aligned with a condenser 10. Part of the light reflected from a semi-reflecting mirror 11 passes through the objective 8 to illuminate the workpiece 7 on the transparent vertically adjustable table 16. Above the table is a pivoted mirror 6 which, in the position shown dotted in Fig. 1 reflects light passing the object 7 back through the objective 8 which forms an image on the screen 9 after reflection of the light beam by mirrors 12, 13. In the position A of the housing 1, with additional condenser 5 attached and with the mirror 6 in the inclined position diasoopic illumination only is provided. The mirror 6 may be concave.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH742124X | 1952-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB742124A true GB742124A (en) | 1955-12-21 |
Family
ID=4533240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8680/53A Expired GB742124A (en) | 1952-04-04 | 1953-03-30 | Improvements in and relating to an optical epidiascopic outline projecting apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB742124A (en) |
-
1953
- 1953-03-30 GB GB8680/53A patent/GB742124A/en not_active Expired
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