Recent content by genny

I still havent been able to get a perfect line. but will try further. Using a 5mW Red Laser, and OHP Fresnel (Does it have a side ?). The line i need is around 25 cms, within the range of the width of the fresnel lense

Thanks all for the comments and advice. I will try to test using fresnel lense. for the two beam option, i have to use two IR wavelengths - perhaps 780 and 980 nm, and use two filters and two cameras, as the experiment uses IR and not visible light.

i,e the shadow length of the objects placed varied, as in the original situation, and the laser line (if viewed from top) was still perhaps projecting at an angle (v shape). Of course, I did not place the line laser at the f length as you mentioned. How can I find out the f length of the OHP...

Dear All, Thank you very much for your kind replies and advise. Actually my ultimate experiment uses IR Lasers (5mW at the moment, using 780nm and 980nm but for Calibration purposes I use a Red Laser. All lasers are Line Lasers. I desire the beam width (not height) to be around 25 cm. laser...

Hi There, I need to create a non diverging, Red laser Beam for a gesture detection experiment. I have a Line laser which creates a line ideal for the purpose, but the line created is projected with a beam angle of around 50 degrees. (i.e. the length of the line varies according to the distance...