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Inverse Hartmann test for radius of curvature measurement in a corneal topography calibration sphere.
Jalife-Chavira, J M; Trujillo-Schiaffino, G; Mendoza-Villegas, P G; Salas-Peimbert, D P; Anguiano-Morales, M; Corral-Martínez, L F; Tornero-Martínez, N.
Afiliación
  • Jalife-Chavira JM; Tecnológico Nacional de México, Instituto Tecnológico de Chihuahua, Ave. Tecnológico No. 2909, Chihuahua Chih. 31310, Mexico.
  • Trujillo-Schiaffino G; Tecnológico Nacional de México, Instituto Tecnológico de Chihuahua, Ave. Tecnológico No. 2909, Chihuahua Chih. 31310, Mexico.
  • Mendoza-Villegas PG; Tecnológico Nacional de México, Instituto Tecnológico de Chihuahua, Ave. Tecnológico No. 2909, Chihuahua Chih. 31310, Mexico.
  • Salas-Peimbert DP; Tecnológico Nacional de México, Instituto Tecnológico de Chihuahua, Ave. Tecnológico No. 2909, Chihuahua Chih. 31310, Mexico.
  • Anguiano-Morales M; Tecnológico Nacional de México, Instituto Tecnológico de Chihuahua, Ave. Tecnológico No. 2909, Chihuahua Chih. 31310, Mexico.
  • Corral-Martínez LF; Tecnológico Nacional de México, Instituto Tecnológico de Chihuahua, Ave. Tecnológico No. 2909, Chihuahua Chih. 31310, Mexico.
  • Tornero-Martínez N; Facultad de Medicina y Ciencias Biomédicas, Universidad Autónoma de Chihuahua, Circuito Universitario 31109, Chihuahua Chih. 31125, Mexico.
Rev Sci Instrum ; 93(4): 043101, 2022 Apr 01.
Article en En | MEDLINE | ID: mdl-35489901
In this article, the use of a square Hartmann screen test to measure the radius of curvature of a corneal topography calibration test sphere is presented. The proposed technique is based on the image formation principle by specular reflection on convex reflective surfaces. Applying an inverse Hartmann test, a de-magnified virtual image (Hartmanngram) is obtained; considering their own scaled reference screen plate, a zonal wavefront retrieval approach is used and the radius of curvature obtained. Experimental setup along the obtained results is presented. A simulated spherical wavefront is used as a method to evaluate the error in the wavefront reconstruction. Since the measurements of radius of curvature fits in to ISO 10343, through suitable modifications the proposed method is potentially applicable in small F/# convex specular surfaces, as is the case in keratometry and corneal topography measurements.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Radio (Anatomía) / Córnea Tipo de estudio: Prognostic_studies Idioma: En Revista: Rev Sci Instrum Año: 2022 Tipo del documento: Article País de afiliación: México Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Radio (Anatomía) / Córnea Tipo de estudio: Prognostic_studies Idioma: En Revista: Rev Sci Instrum Año: 2022 Tipo del documento: Article País de afiliación: México Pais de publicación: Estados Unidos