field lens


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field lens

See eyepiece.

field lens

[′fēld ‚lenz]
(optics)
The lens in a two-lens eyepiece which is farther from the eye.
References in periodicals archive ?
The scanning velocity and line interval were set as 6 m/s and 1 [micro]m, respectively, under an assumption that the focal length of field lens was 163 mm.
The SLV Eyepieces also incorporate a 7-element design in 4 groups with fully multicoated glass-to-air surfaces, a scratch-resistant coating on the field lens, and a rare-Earth lanthanum element.
The field lens was hopelessly coated with tar, and he eventually had to discard a prized eyepiece.
Contract Awarded for testing of hermes flat field lens for replacment
Eye relief was tight with the 6-mm eyepiece, but the recessed region around the eye lens's "volcano top" let me to soak in the sharp image without smudging the field lens with errant swipes of my eyelashes.
VI Technology combines deep depth of field lens, high directivity LED lamp and CCD linear image sensor to minimize the unevenness in image quality during scanning and produce uniform document quality.