This thesis presents a design of an afocal 7.5X zoom lens with maximum resolution of 0.68μm followed by a reversed ray trace method to show and correct kernel aberrations in zoom lens, with some examples.

Download scientific diagram | Exploratory afocal zoom lens shown at five zoom positions with corresponding OPD’s for axial and full-field angles. The magnification for each figure is (a) 1.72 ...

We have designed a new kind of focal reducer for the 2.3 m Thai National Telescope (TNT) to image the TNT specified FOV Δθ = 14.6’ with an angular resolution α ≈1.2 arcsec. This, at a minimum cost...

2012年10月1日 · Afocal zoom lenses are state of the art modules for magnification changing in instrument optics, especially in the field of scientific and surgical stereo microscopy. Carl Zeiss...

Combinations of lenses can produce afocal systems. A ray parallel to the axis produces an image ray that is also parallel to the axis. Common afocal systems are telescopes, binoculars and beam expanders. 1 is coincident with the front focal point of the second lens F 2. This configuration forms the basis for refracting telescopes (Keplerian).

Zoom lens consists of an afocal zoom system + focussing lens Afocal zoom takes in parallel light and changes diameter Acts as a variable beam expander

Diagram of the light path in an afocal system. In optics, an afocal system (a system without focus) is an optical system that produces no net convergence or divergence of the beam, i.e., has an infinite effective focal length. [1]

2021年3月30日 · In particular, we discuss what afocal systems are, how to analyze afocal systems in terms of angular units, how to handle cylindrical systems, and how to work with systems with multiple focal and afocal spaces.

1990年12月1日 · We show how it is possible to produce an afocal electrostatic lens with true zoom control. This is done by relaxing the requirement that V31 equals √ V51 of the original Heddle lens [D.W.O. Heddle, J. Phys. E4 (1971) 981]. A substantial range of magnification is available over a wide range of overall voltage ratios.

2012年10月19日 · Afocal zoom lenses are state of the art modules for magnification changing in instrument optics, especially in the field of scientific and surgical stereo microscopy. Carl Zeiss implemented many types of afocal zoom lenses in the microscopy instrumentation in more than 30 years. Mechanically compensated zooms with two moving members for magnification range between 4x and 20x are the most ...