field flattener

field flattener

[′fēld ‚flat·ən·ər]
(optics)
A thin planoconvex lens placed in front of the photographic plate in some telescopes that have a curved focal plane so as to focus light on the flat plate.
References in periodicals archive ?
This new lightweight model features the Field Flattener lens system, which delivers an extremely wide 8.3-degree field of view while maintaining excellent image clarity.
Optical and Field Flattener systems; multicoated ED glass
The Field Flattener Lens System[TM] works in combination with the wide field of view for sharp edge-to-edge viewing.
Employing eyepieces with superior optical performance, WX binoculars achieve a super-wide field of view (apparent field of view of 66.6 for WX 7x50 IF, 76.4 for WX 10x50 IF), while their Field Flattener Lens System compensates for a curvature of field across the entire field of view.
Field flattener lenses produce edge-to-edge clarity and require less refocusing.
Field Flattener Lenses: These lenses are located between the prism system and the ocular-lens system.
Using field flattener lens, which helps to create a true image, for the first time it is possible to produce diamond-bright image resolution right up to the very edge of the field of view ensuring the finest detail without any edge distortion.
Without a field flattener like Meade's optional Series 6000 model, stars near the field edge are radially elongated, as is typically seen in an uncorrected refractor.
The HD lenses work in concert with the Field Flattener lenses to produce edge-to-edge clarity; less focusing, rich contrast, and color fidelity in a wider field of view.
The Field Flattener system will help relieve eye fatigue by minimizing curvature at the edges of the viewing area.
The EL 42 uses new field flattener lenses to create a true image and super bright image resolution all the way to the very edge of the field of view without any edge distortion.