Laser projector project made by teacher ChaN

Mr. ChaN imagines that everyone has seen laser effects on stage, at a disco or at a festival. There are two types of laser effects. One is the beam effect, which shows the audience a laser beam flying through the air. The other is a screen effect, which displays laser graphics drawn on the screen by a moving laser point. It is preferred that the first beam effect is better than the screen effect. The beam effect is very exciting, so there are also many laser light shows in discotheques. The laser equipment that works in a laser light show is called a laser projector. This project is to build a professional grade DIY laser projector. The most important component of a laser projector is the laser unit. Helium-neon lasers were used in the early days, and later multicolor mixed gas lasers were used in high-end laser projectors. Solid laser is a new type of laser device that will soon replace gas lasers. However laser units are very expensive, even junk units, and gas lasers cannot be directly modulated, so I can't decide to buy a laser unit and a modulator. In the first quarter of 2004, Mr. ChaN found a cheap solid-state laser module at Kyoritsu Denshi and started this long-planned project.