field lens

The lenses are called the eye lens and the field lens.

A single standard flat field or curved field lens would have major focus and distortion issue.

A separation of exactly 1 focal length is also inadvisable since it renders the dust on the field lens disturbingly in focus.

A third wheel, located at the F/38 telescope focal plane inside the camera, contains grism slits and field lenses.

The process differs from Optical Printing in that no optical elements (lenses, field lenses, etc.) separate the two films.

Lyot Stop is located at the image of the objective formed by a field lens, with an aperture slightly smaller than the objective image.

In the Huygenian eyepiece, the focal plane is located between the eye and field lenses, inside the eyepiece, and is hence not accessible.

Eyepieces are differentiated by their field stop, which is the narrowest aperture that light entering the eyepiece must pass through to reach the field lens of the eyepiece.

"They've been watching us all morning," ben Yehuda lowered his field lenses, rubbed his back to ease it, then swung his flamethrower back over his shoulder.

An RKE eyepiece has an achromatic field lens and double convex eye lens, a reversed adaptation of the Kellner eyepiece.

The 4-element orthographic eyepiece consists of a plano convex singlet eye lens and a cemented convex-convex triplet field lens achromatic field lens.

The number of elements in a Nagler makes them seem complex, but the idea of the design is fairly simple: every Nagler has a negative doublet field lens, which increases magnification, followed by several positive groups.

In practice, however, due to the relatively low mass of field lenses and the inherent randomness in intrinsic shape of background sources (the "shape noise"), the signal is impossible to measure on a galaxy by galaxy basis.

In some eyepiece types, such as Ramsden eyepieces (described in more detail below), the eyepiece behaves as a magnifier, and its focal plane is located outside of the eyepiece in front of the field lens.

In imaging optics, a field lens is a positive-powered lens or group of lenses that comes after the objective lens and before the image plane or the eyepiece, serving to change the size of the image, or to provide image-space telecentricity.

Of the 200 or so plants that Les Mehrhoff plucked, sniffed, pinched, tasted or peered at through a field lens during a three-hour hike along the shore of Long Island Sound late Friday afternoon, probably three-quarters were not from around here.