A method has been developed by means of which the contrast rendition of telescopic systems can be measured using collimated light. The method utilizes an optical-electronic apparatus referred to as “the contrast rendition apparatus model 2” and is designed following the basic principles for such equipment as described in a previous paper. This apparatus is 60 inches long, 30 inches wide, and 65 inches high, and includes an assembly referred to as “the artificial sun.” This assembly permits the measurement of the contrast rendition of telescopic systems for the simulated condition of observation in which a bright luminous body may appear to be located near the region under examination. The contrast rendition has been measured for a number of prism and lens erecting telescopic systems for a variety of conditions simulating situations of intended uses for such optical systems. The numerical values of the contrast rendition were found to range from 0 to 93 percent for the optical systems studied.

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription