title: New configuration of a lens for a 35-mm cinema projector.
abstract: A new lens system configuration having seven uncemented elements made of Indian optical glasses has been developed. It has focal length of 75 mm, relative aperture of f/1.4 and is to be used in a 35-mm cinema projector objective. To compare the performance of this lens system, a commonly used design of seven uncemented elements based on double-Gauss configuration was also developed. The performance of the designs was evaluated by plotting aberration curves, energy distribution curves, and the geometrical MTF curves. The proposed new configuration gives better performance compared with the double-Gauss configuration being used currently.
authors.forename: M K
authors.initials: MK
authors.lastname: Mittal
authors.forename: B N
authors.initials: BN
authors.lastname: Gupta
authors.forename: K D
authors.initials: KD
authors.lastname: Sharma