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 #:
00057
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
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

Bausch & Lomb Optical C o m p a n y Combined Balopticon with Arc Lamp Model CRA Figure 1—Combined Balopticon with Lamp House Tilted for Projection of Opaque Illustrations and Objects. To those who have direct current and for some reason desire an arc lamp as illuminant, this model of the Combined Balopticon will appeal. If it is desired to use moving pictures, for instance, Model CRA with moving picture attachment, as described on a following page, makes an ideal equipment. The Combined Balopticon as here offered is designed along lines that have been found by experience to be most satisfactory from the standpoints of efficiency and convenient manipulation with this type of illuminant. When pro- jecting from opaque objects, the lamp house, with arc lamp and condensing system, is shifted to the inclined position, shown in Figure 1, so that the beam of light falls directly on the object, is collected by the projection lens and directed to the screen by the first-surface mirror above the lens. By this system a brilliant illumination is insured. In projecting lantern slides the lamp house is placed in the horizontal position, shown in Figure 2. The light from the condensing system in the front of the lamp house passes through the dark chamber in approximately parallel pencils to 54