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 #:
00021
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 Opt ical Company tables give in feet the length of one side (the longer in the case of lantern slides) of the screen image to be obtained at the different projection distances and with the different lens foci indicated. Table 1: For Lantern Slides, 2 % x 3-inch Mat Opening Example:—A 10-inch lens used at a distance of 40 feet from the screen will project an image measuring 12 feet on its longer side. Table 2: For Opaque Objects, 5 x 5-inch Opening Example:—A 15-inch lens used at a distance of 25 feet from the screen will project an image 8 feet square. Table 3: For Opaque Objects, 6 x 6-inch Opening Table 4: For Opaque Objects, 8 x 8-inch Opening 18