Hand made

SPHERICAL RADIUS OPTICS

Our company manufactures unique and individually-made micro optical lenses by hand, with our focus being on the field of spherical radius optics. We mainly produce the optical elements of endoscopic equipment designed for medical, therapeutic and technical use.

Single- and double-sided lenses, front lenses, menisci, achromates, masked optical elements, unique lenses and lenses of compound optical systems, the radii of which extend from 0,500 mm to flat surface, with their diameter ranging from 0,600 mm to 12,000 mm.

Due to the sizes of the lenses we make, series production is not possible. The starting point of manual production is that lens radius should be larger than half its diameter, but less than the entire diameter.

We process the lens on the lapping machines by hand, using diamond tools of various fineness. Workpieces are secured using either black tar adhesive or a manual gripping tool according to the technological specification. Afterwards, we define the approximate centre thickness of the lens using a lapping/stocking tool, as well as form its proper radius of necessary (based on lens type and the Customer's requirement). Then, we use ever-finer tools to create the proper lens surface with the ideal centre thickness before polishing is carried out. The number of polishing steps applied and the grain size of the polishing material are determined by the characteristics of the glass used. Due to the 1/1000 mm precision measurements done during manual lapping and the entire work process, we are able to polish highly accurate lens surfaces. The lens surface is not yet transparent after polishing; similarly to mottled glass, it is translucent. Therefore, the workpiece is further processed on the polishing machines.

The polishing machine polishes the lens surface using the appropriate polishing material in 3 steps until the lens is smooth. During the process, we supervise the lens parameters based on the criteria supplied (rings, colour, surface, etc.)

The lenses are continuously checked visually under a microscope, which aids primarily in spotting surface defects. The processed lens is then placed on an equivalent etalon lens that has a negative relative curve; thereby, we can determine the deviance of the lens surface from the correct or etalon surface to a high accuracy (ca. 1/50000 mm) based on the shape and form of the interference rings visible on the boundary surface.

The finished lenses are cleaned, and following quality checks (which also include the interferometric inspection), they are packaged and dispatched to our clients.


Production sizes

DIMENSIONS AND TYPES

The finished lenses are cleaned, and following quality checks
​(which also include the interferometric inspection), they are packaged and dispatched to our clients.

MINIMUM

D - 0,600mm    /   R - 0,500mm

MAXIMUM

D - 12,000mm    /   R - 9,000mm







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