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English Afrikaans Albanian Arabic Armenian Azerbaijani Basque Belarusian Bulgarian Catalan Chinese (Simplified) Croatian Czech Danish Dutch Filipino Finnish French German Greek Hebrew Hindi Hungarian Icelandic Indonesian Irish Italian Japanese Korean Latvian Lithuanian Macedonian Malay Maltese Norwegian Persian Polish Portuguese Romanian Russian Serbian Slovak Slovenian Spanish Swahili Swedish Thai Turkish Ukrainian Urdu Vietnamese

Centering

Centering with the PSM (ABSTRACT)

ABSTRACT: Desribes step-by-step how to calculate the locations of the centers of curvature of optical elements to be centered, and how to set up one or two PSM's to center the lenses as they are assembled on a rotary table. Also discussed are practical issues relating to the hardware, and calculation of sensitivites to alignment.

Conjugate Selection for Precision Lens Centering (ABSTRACT)

ABSTRACT: The concept of centering a precision, symmetric lens system using a high-quality rotary table and an auto-focusing test instrument are well known. Less well known are methods of finding convenient, or easily accessible, lens conjugates on which to focus while performing the centering operation. We introduce methods of finding suitable conjugates and centering configurations that lend themselves to practical centering solutions.

Lens Centering Using the Point Source Microscope (ABSTRACT)

ABSTRACT: Precision lens centering is necessary to obtain the maximum performance from a centered lens system. A technique to achieve precision centering is presented that incorporates the simultaneous viewing through the upper lens surface of the centers of curvature of each element as it is assembled in a lens barrel. This permits the alignment of the optical axis of each element on the axis of a precision rotary table which is taken as the axis of the assembly.

Practical Alignment Using an Autostigmatic Microscope (ABSTRACT)

ABSTRACT: This paper defines optical alignment as placing optical conjugates and centers of curvature at the precise locations specified in the optical design. Auto-stigmatic microscopes (ASM) are the tools used to measure the offset between the optical conjugates and physical datums such as centers of balls and axes of cylinders in alignment fixtures and making precise alignment practical.