An Optical System With Continuously Variable Spherocylindrical Power

David L. Guyton; Hewitt D. Crane

doi:10.1117/12.956509

8 August 1978 An Optical System With Continuously Variable Spherocylindrical Power

David L. Guyton, Hewitt D. Crane

Proceedings Volume 0141, Adaptive Optical Components I; (1978) https://doi.org/10.1117/12.956509
Event: 1978 Technical Symposium East, 1978, Washington, D.C., United States

Abstract

Conventional instruments for measuring or correcting refractive errors of the human eye contain large numbers of individual spherical and cylindrical lenses. Refracting instruments having continuously variable power (optometers) are mechanically simpler and allow smooth adjustment of power by the subject (subjective optometers) or smooth adjustment of power by automated photo-electronic sensing mechanisms (objective optometers). Optometers with spherical optical systems have had some clinical success, but those with spherocylindrical optical systems, described since the 1800's, have never been practically useful. Power ranges have been too small, scales have been non-linear, and adjustments have been awkward. Renewed interest in the automation of clinical refraction has led to the development of a spherocylindrical optical system overcoming the disadvantages of previous systems. Cylindrical lenses movable in a prescribed fashion along the optical axis provide continuously variable spherocylindrical power over a wide linear range. This system, in addition to forming the basis of a new refracting instrument, may provide a useful means for manipulation of spherocylindrical power in other optical applications.

Citation Download Citation

David L. Guyton and Hewitt D. Crane "An Optical System With Continuously Variable Spherocylindrical Power", Proc. SPIE 0141, Adaptive Optical Components I, (8 August 1978); https://doi.org/10.1117/12.956509

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Eyeglasses

Spherical lenses

Cylindrical lenses

Eye

Lenses

Optical components

Refraction

Show All Keywords

Keywords/Phrases

Search In:

Publication Years