:: Micrometer Scale ::

Used for measuring lengths of specimen or distances between points on a variety of different shaped objects. NE1 Scale shown: This eyepiece graticule has an overall length of 10.00mm with 100 subdivisions of 0.1mm. When used with a x10 objective each division will represent 10 microns on the specimen. By dividing the division of the chosen graticule by the magnification of the objective one obtains an approximate value that each division will

1. Horizontal Micrometer	2. Vertical Micrometer	3. Cross Micrometer
4. Micrometer with Cross	5. Micrometer scale 1mm in 0.01mm divisions.

:: Concentric Cirlce Scale ::

Can be used for two-way measurement when calibrated as a micrometer.

:: Protractor Scales ::
 

Placed in the eyepiece, these are used in the same manner as ordinary protractors.

:: Test Charts ::

Two patterns are available, 0-7 and -2-7, produced in accordance with the USAF Resolving Power Test Target. The most popular range is 0-7 group, with 6 elements per group, an element consisting of two target patterns of 3 lines at 90º to each other, the line space ratio being equal. These charts are produced as a chrome surface image on glass plate.

Test Resolution Charts are normally supplied as chrome high contrast pattern with positive image. Can be supplied in low contrast and negative form on request. Range from 3 lines to 20 lines per mm.

Star Test Target is used qualitatively to demonstrate focusing affects and for rapid assessment of focal plane position. Its overall size allows it to be used not only as a camera or optical bench target, but also as a test slide for 35mm projectors.
 

10. USAF Test chart	11. Test Resolution Chart	12. Star Test Target

:: NUEBAUER COUNTING CHAMBER ::
(A device used for cell counting)

“HIND-OPT” Nuebauer Counting Chambers are the finest quality, optically ground, and polished milled glass chambers. The chamber is diamond etched and has a double improved Neubauer Ruling, meeting the most demanding of standards.

The standard blood counting chambers are, one-piece construction (measuring 75mmx32mmx4.5mm) ensuring long-term durability and absolute accuracy in measurement and count. The tolerances are (2% of the volume).

Rulings cover 9 square millimeters. Boundary lines of the Neubauer rulings are the center lines of the groups of three. The central square millimeter is ruled into 25 groups of 16 small squares, each group separated by triple lines, the middle one of which is the boundary. The ruled surface is 0.10 mm below the cover glass, so that the volume over each of 16 small squares is 0.00025 cubic mm.

:: Bright – Line Counting Chamber ::

In addition to the standard ruling patterns, which are etched permanently onto the polished surface, we offer the popular “Bright-Line” counting chamber. This bright-line counting chamber allows the ruling to appear brightly illuminated providing sharp contrast to the bright lines and cells, helping the user with accurate counts and less eyestrain. The triple lines show clearly which cells lie within the counting area and eliminate guesswork.

We guarantee that all marks are permanent, and cannot be removed even after repeated washings.
 

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