Measurement of spherical and cylindrical power in ophthalmic lenses based in the change of lateral amplification.
In this article, we present a new technique to measure spherical and cylindrical power in ophthalmic lenses. This method is based in the change of lateral amplification produced by an optical system when introducing an ophthalmic lens. Ophthalmic lens power is calculated by considering the change in image size from a reference object and its own image seen through the ophthalmic lens. Mathematical analysis is presented along with the experimental setup and the obtained results. Several algorithms were applied to the obtained results as a method to compensate the error in order to fit into ISO 8598 specifications.
División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Chihuahua, Chihuahua 31310, México.
P G
PG
Mendoza-Villegas
División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Chihuahua, Chihuahua 31310, México.
G
G
Trujillo-Schiaffino
División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Chihuahua, Chihuahua 31310, México.
D P
DP
Salas Peimbert
División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Chihuahua, Chihuahua 31310, México.
M
M
Anguiano-Morales
División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Chihuahua, Chihuahua 31310, México.
L F
LF
Corral-Martínez
División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Chihuahua, Chihuahua 31310, México.
I A
IA
Garduño-Wilches
D005139:Eyeglasses; D055620:Optical Phenomena