curvature of field


Also found in: Medical.

curvature of field

(field curvature) A minor aberration of a lens or mirror whereby an object lying in a plane perpendicular to the optical axis produces an image lying not on a plane but on a curved surface. If there is any astigmatism present there will be two curved focal surfaces.

curvature of field

[′kər·və·chər əv ′fēld]
(optics)
Error in the image of a plane object formed on a flat screen by an optical system when the best image lies on a curved surface. Also known as field curvature.
References in periodicals archive ?
Viewing on 1x and 6x I noted no internal flare, astigmatism, spherical aberration or curvature of field. There was some minor barrel distortion in the vertical plane on 1x but this went away as the magnification was increased.
Resolution: 15 [Excellent), Contrast: Excellent, Astigmatism: None, Curvature of Field: None, Rolling Distortion: None, Pin Cushion Distortion: None, Barrel Distortion: None, Color Fidelity: Excellent
MODEL: SOLO RECON R/T 8X28MM .10X50MM TYPE: MONO MONO BINO BIND RESOLUTION: 6 6 8 8 CONTRAST: Excell Excell Excell Excell ASTIGMATISM: No No No No CURVATURE OF FIELD: Yes Yes Yes Yes ROLLING DISTORTION: No No No No PIN CUSHION DISTORTION: Slight Slight Slight Slight BARREL DISTORTION: No No No No COLOR FIDELITY: Excell Excell Excell Excell MODEL: 4-16X50MM 5-20X50MM 20-6OX85MM TYPE: RIFLESCOPE RIFLESCOPE SPOTTING SCOPE RESOLUTION: 8 10 15 CONTRAST: Excell Excell Excell ASTIGMATISM: No No No CURVATURE OF FIELD: No No No ROLLING DISTORTION: No No No PIN CUSHION DISTORTION: No No No BARREL DISTORTION: No No No COLOR FIDELITY: Excell Periphery Excell Clearly the HD Extra-low dispersion glass is better and is higher priced.
They had slight pincushion distortion but no rolling distortion, and curvature of field was well taken care of.