optical designs

^{optical designs}

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optical designs

This page is a table-of-contents/links to pages that each describe and illustrate a specific optical design. Sorry, web-pages for only a few of the following designs have been prepared to date - work in progress.

optical designs
>>> refractive elements only : no mirrors <<<
>> achromat, 8" f/12 : conventional telescope objective : corrected for 2 colors
>> apochromat, 8" f/12 : corrected for 3 colors, moderately low residual chromatic aberration
>> ultra-achromat, 8" f/12 : corrected for 3 to 5 colors, very low residual chromatic aberration
>> hexagon, 4" f/6 : moderate speed & field, minimal chromatic aberration, astrograph/spectrograph

>>> reflective elements only : no lenses <<<
>> newtonian, 10" f/6 parabolic mirror
>> cassegrain, 10" f/6, parabolic primary mirror, hyperbolic secondary mirror
>> dall-kirkham, 10" f/6, elliptical primary mirror, spherical secondary mirror
>> ritchey-chretien, 10" f/6, hyperbolic primary mirror, hyperbolic secondary mirror

>>> refractive and reflective elements : lenses and mirrors == catadiotric <<<
>> schmidt camera, 10" f/2, curved field
>> schmidt camera, 10" f/2, field flattener lens
>> schmidt cassegrain, 10" f/4, flat field without field lenses
>> schmidt cassegrain, 10" f/4, concentric, no field flattener lens
>> schmidt cassegrain, 10" f/4, concentric, with field flattener lens
>> schmidt cassegrain, 10" f/6, complex, with field corrector lenses, for 6x7cm SLRs
>> maksutov cassegrain, 10" f/6, spherical surfaces, with field corrector lens, 3+ degree flat field