title: Improved Ronchi tester.
abstract: We used a LED in a Ronchi tester to obtain two main improvements: (i) We can choose one of two wavelength bands to illuminate and record the ronchigram, and (ii) we can change the irradiance of the illumination source according to the optical system under test and the detector array. This can be done by use of an adequate electronic circuit.
authors: Facultad de Ciencias Físico Matemáticas, Posgrado en optoelectrónica, Benemérita Universidad Autónoma de Puebla, Puebla 72000, México. mnunez@fcfm.buap.mx
authors: J M
authors: JM
authors: Nuñez-Alfonso
authors: A
authors: A
authors: Cordero-Dávila
authors: S
authors: S
authors: Vergara-Limon
authors: J
authors: J
authors: Cuautle-Cortes