BR PAR MR Comparison Illustration Diagram Image

How to select right light bulbs

Understanding common light bulb shapes, sizes, and styles is important as an desiger, here is the Ultimate Guide to PAR and BR light bulbs

eye model

How to Simulate Human Eye

There have been dozens of eye models published over more than 150 years, here presents several models of the human eye in using only glass catalog data.

Merit Function

How to Optimize the optical lens

This blog introduces the basic concepts of optimization, demonstrates how to set parameters as variables, shows how to use the Merit Function

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