OMAX - FBA_CS-A36CALM1 0.01mm Microscope Camera Calibration Slide (Stage Micrometer)

Its a little tricky to correctly position the sample to be able to see the calibrates, but it works

Es una lámina portaobjetos de calibración muy práctica a la hora de determinar el tamaño de especímenes observados en un microscopio óptico.

I used this reticle to directly check the magnification of a digital microscope. The image of the reticle can be directly measure on the screen. (I found that the advertisement of the microscope in question contained an exaggeration.) With this information, the sizes of objects being viewed can be calculated directly. Of course, magnification is only half of the practical question -- the other half being resolution. With the clean lines on the reticle, one can get an idea of that too, but seeing by how many pixels the sharp line edges are blurred on the screen.

The scale on the slide has changed and no longer matches images shown for this product. The 0.05 mm increments are no longer slightly longer than the 0.01mm increments - only the 0.1 mm increments are different length. This isnt a big deal, unless you have written your calibration software based on the older slide.

This slide has a one millimeter scale, subdivided into tenths and hundredths (i.e. ten-microns). You can imagine, therefore, that the graduation lines are quite thin. Despite this, the outline of those graduations is precise and clear. Does the job well, and easy to use because of that clarity.

Seller Amazon does themselves a disservice by not showing a clearer image of the calibration marks on this slide. The marks are photo-lithographed metal, probably sputtered onto the slide in a vacuum chamber similar to a semiconductor manufacturing process. The circle surrounding the 1.0 mm ruled line is about 3 mm in diameter and approximately 30-45 microns wide. The 1.0 mm ruled line is divided into major divisions of tenths, or 100 microns per major division. The major divisions are delineated by longest lines. Each major division is divided into two intermediate divisions by intermediate-length lines; so 50 microns per intermediate division. Each intermediate division is divided into five smallest divisions of 10 microns each. I estimate the line width delineating each small division to be about 2 microns wide; so were talking about very precision manufacturing for this calibration slide. Note that I cannot vouch for the absolute accuracy of the length of the full 1.0 mm graduated line. I can simply report that the full graduated line is divided very evenly and precisely into 100 small (~10 micron) divisions. Very impressed. The only negative that I have to report is that the ridges inside the plastic cover do not support the slide thickness very precisely. Consequently the slide has some play within the case when transported. Wrapping the slide back up in the thin paper in which it is originally packaged inside the plastic storage case solves that problem.

Meets specs exactly and I got it fast. Good job.

It is very helpfull, i can add a scle for my samples and also do mesuments

Almost pro quality. Not nist certified, but are you doing professional work? I am a professional and let students use this. I use it too for spotchecks. Pull out the one thats $$$$ and certified seldom so it isnt damaged.

Excellent for what were using it for - scale for a single image to calibrate other images on that stereoscope at the same optical zoom.