Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

A New Non-Intermittent Sensitometer

Not Accessible

Your library or personal account may give you access

Abstract

A new non-intermittent sensitometer has been constructed which consists of two sector wheels rotating about the same axis at different angular speeds. During the exposure, the larger disk makes only one revolution. In this interval, the small disk makes many revolutions but the large wheel covers the photographic material except for one revolution of the small wheel.

With the ordinary sector wheel sensitometer, the exposure range is rarely more than 256 to 1 because of the difficulty of cutting the wheel. It is shown that by using two sector wheels, the exposure range may easily be increased to 16,384 to 1. An extension of this principle to three disks would not involve any serious mechanical difficulties and would increase the exposure range to more than one million to one.

© 1925 Optical Society of America

Full Article  |  PDF Article
More Like This
A New Photographic Sensitometer

W. M. Cady
J. Opt. Soc. Am. 29(11) 470-471 (1939)

Characteristics of Photographic Materials in the Ultraviolet

George R. Harrison
J. Opt. Soc. Am. 11(4) 341-356 (1925)

A New Method for Photographic Spectrophotometry*

Loyd A. Jones
J. Opt. Soc. Am. 10(5) 561-572 (1925)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved