Projection Apparatus (1917)

Record Details:

Title:
Projection Apparatus
Date:
1917
Publisher:
Rochester, N.Y: Bausch & Lomb Optical Co.
Volume:
Bausch & Lomb Optical Co. Projection Apparatus
Leaf #:
00063
Language:
English
Collection:
Magic Lantern and Lantern Slide Catalog
Format:
Catalogs
Contributor:
Toverlantaarnmuseum Scheveningen (TOMU)
Sponsor:
A Million Pictures
Coordinator:
Media History Digital Library
Description:
This catalogue advertises various projection devices, for projection of transparent images and for the projection of opaque objects as well as film projectors. The technical workings of each apparatus are explained. The catalogue also lists projection lenses and light sources (electric light, carbon light, oxyhydrogen light), fuses, light bulbs, switches and microscopes for projection. The catalogue is richly illustrated.
Date Added:
March 28, 2024
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Bausch & Lomb Optical Company " . It is sometimes desired to project lantern slides at a greater distance than is ■I mSm *possible with the regular 8 or 10-inch focus projection lens. For this reason we supply a set of accessories by means of which the projection lens for opaque objects, which is of 15 or 18-in. focus, may be utilized for the purpose. These accessories consist of a 4/4-inch condens- ing lens, which completes the triple system, a slide carrier support (the regular slide carrier being used), bellows and front standard to support the projection lens, Figure 2. The accessory optical bed is required to support the front standard carrying the lens. The mirror in the dark chamber is turned to the horizontal position, giving a direct path of light from arc lamp to screen. With this arrangement it is possible to project a distance of 75 or 80 feet, thus, with small additional expense, making the apparatus available for long distance lantern slide projection in large halls and auditoriums. Figure 2—Accessories for Projecting Lantern Slides with Long Focus Lenses. Projection of Opaque Objects Figure 3—Universal Balopticon ERA 15 in Position for Projection of Opaque Objects. 60