Author Archives: Shmulik Barzilay

Diffusive Lenses Radii Measurement

Diffusive Lenses Radii Measurement

One of the challenges of the optical manufacturer is measuring a lens curvature and its radius. Producing a lens has a long process from the raw material stage until the final product is created, which is polished and curved, either spherical or aspherical.

Measuring a polished and transparent flat lens is possible, albeit challenging. Measuring a polished and transparent lens which is curved is even more challenging since the signal back-reflection has to go inside the detector in order to get a measurement. The angular coverage of a laser sensor over glass is very limited and stands over a few degrees only.
Along the lens manufacturing process there is a stage where the lens is still diffusive after its grinding, and before polished. Such condition is perfectly suitable for measuring by a non-contact laser sensor. Other technologies which are also used today are manual spherometer and a touch probe. Both are relatively slow process and a non-contact sensor can make the measurement much faster.

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Screen Scratch Inspection

Screen Scratches Inspection

Nowadays a lot of glass screen manufacturers have to monitor their process constantly. Among the different measurements are glass thickness, glass coating thickness and scratch inspection.

Many products such as computer touch screens, phone screens and LCDs have those needs. Most of the tests are done today in Far-East countries such as Korea, China and Japan, but not exclusively. Many of them use vision equipment in order to cover large areas, and combine this with high-resolution laser sensors over local detected “suspicious areas.”

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High Speed Tire & Rubber Inspection

conopoint tire scan

Tire manufacturers need to inspect their tire grooves with its sharp angles and hard geometry. High quality tires are usually made out of black rubber which is more challenging to measure due to its low reflection signal. The problem becomes even more challenging when there are paint marks on the tire which are a different color, with a different back signal. The Optimet sensors provide both SNR parameter and also “Total”, which is the amount of light used by the detector on every surface. Both in R&D sections and on the manufacturing floor, engineers are using sensors to monitor the tire erosion, and to better understand the effects of sipes geometry on the tire’s performance.

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