Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures (1914)

Record Details:

Title:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures
Date:
1914
Author:
Gage, Simon Henry, 1851-1946
Publisher:
Ithaca, N.Y. : Comstock Publishing Co.
Volume:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures
Leaf #:
000246
Language:
English
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Bibliography: p. 693-703
Date Added:
July 19, 2022
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.

CH. IX] MICROPROJECTION WITH OCULARS 231 In using the ordinary oculars a small tube must be screwed into the large microscope tube as for ordinary observation (fig. 147, 197). Special oculars have been designed for projection. Some, like those of Zeiss (fig. 128) give sharp brilliant images, but the field is very small. Williams, Brown and Earle have a very large proNo. 2. No. 4. FIG. 128. PROJECTION OCULARS OF ZEISS. (From Zeiss' Catalogue, No. jo). A section has been removed to show the construction. Both are of the negative form. The eye lens is in a smaller tube with spiral movement to enable the operator to focus the image of the diaphragm of the ocular sharply on the screen. Below are shown in face view the upper ends of the oculars with their graduated circles. By noting the position in any experiment it is easy to set the position exactly the same if the experiment is to be repeated. No. 2, No. 4 These numbers indicate that the ocular magnifies the image two or four times (see § 391). jection ocular of the Huygenian form which magnifies about twice. On account of the loss of light and the restriction of the field of view, the writers of this book do not advocate the use of oculars for ordinary micro-projection, but sec § 401. § 357a. Designation of oculars. — At the present time an ocular is usually designated by the increase in magnification it gives a microscopic image when the microscope is used in the ordinary way. For example, if the objective alone would give an image 10 times as long as the object, then an ocular x 2 should double that size, thus giving an image magnified 20 times, and an ocular x 4, an image magnified 40 times and so on.