Specifications

Kensington (lock and slot) - A Kensington Security Slot (also called a K-Slot or

Kensington lock) is a small hole found in the base of Ken-A-Vision cameras. It is

used for attaching a lock, in particular those from Kensington Technology Group.

The locks are generally secured in place with a key or some mechanical pin

device and attached with a strong metal cable to some permanent object, such as a

heavy table or other similar equipment. Provides limited security.

Kohler Illumination (microscopes)– Kohler illumination is a technique that provides

optimum resolution and contrast in a light microscope by aligning and focusing

the illumination and critical setting the apertures of the microscope to best match

the objective lens Numerical Aperture. (see any good book on microscopy) – (see

also Numerical Aperture)

Laser alignment (tool, guide. or feature) – found on the Ceiling DocCam II (910-171-

066) camera. When laser is activated it ensures proper document orientation by

indicating where a document should be placed for best viewing on the table below

the camera. Laser displays for five seconds when the camera is first powered on.

Lens(es)

Achromat - A combination of lenses made of different glass, used to produce

images free of chromatic aberrations.

f-stop (e.g. f1.4-f2.8) - the f-number (sometimes called focal ratio, f-ratio, or

relative aperture of an optical system expresses the diameter of the

entrance pupil in terms of the effective focal length of the lens. It is the

quantitative measure of lens speed.

8 mm – Standard lens on all Video Flex cameras and all FlexCams by Ken-A-

Vision. Refers to the physical diameter of the original lens. Field of view

is slightly smaller then the field of view of a 6 mm.

6 mm - Standard lens of all Vision Viewer cameras. The field of view of a 6 mm

lens is slightly larger than that of an 8 mm lens.

C-Mount – see C-mount lens

Objective lens - (see Compound lens)

Light sources

Ken-A-Vision Cool Light - becoming standard on all ESH, T-1100, T-1200,

T-1700, T-1900 Ken-A-Vision microscopes. It consists of a variable

(depending upon model) number of specialized LED lights. Importance is

that the light source does not generate significant heat, damaging living

specimens.