Recent content by jj236

What parts would I need from DTR for a 520nm 50mw laser pointer to fit the host?

For a night laser pointer, what wattage is enough? 50mw? Is 5mw too low? What about beam diameter (easier to see a larger brighter beam for pointing)?

I am interested in building a laser pointer for astronomy star pointing and bird watching/pointing (night/daylight pointer). I have never built a laser pointer, but have some ideas where I think I might want to start... I'm considering: Wavelength: Green 520nm (PL520 520nm) Wattage: Enough to...

Thanks for the info. I'm going to check the feasibility of building "PL520 520nm Laser Diode In 20mm Copper Module W/Driver". Figure I'll need the diode+driver+lens+host. Hopefully it doesn't need to be more complicated than that. I'll start some separate threads for this potential build.

Where is a good source for a variety of laser pointer hosts? Looking for a good site to browse pictures of the designs. Looking for something better than the 302 host. I like the lockout and the side switch.

What is a recommended 10-20mw 520nm green direct diode?

I'm considering getting another laser pointer mainly to use for astronomy, bird watching, general pointing. Looking for: 1) Does the job of pointing/visibility very well. Not into burning. 2) If it does the job, then safety from anything accidental. For reference: I purchased 2 laser...

This manufacturer makes some confusing IR filter suggestions: Product Item #1: IR filter removes 95% infrared light @ 532nm Output Power ~5.0 mW Product Item #2: IR filter not required on semiconductor XT diodes Diode Circuit Type - OSRAM Semiconductor 515nm Output Power ~5.0 mW An IR...

If I look at the laser beam (that's purpose of a laser pointer), will I be receiving infrared? Or does the laser beam need to be pointed near the eyes?

In regards to IR, what should we be aware of?

I'm from Washington State, USA. Primary laser usage is for astronomy, star parties, star pointing.

I'm using a laser pointer for astronomy and pointing at the stars. Therefore the laser beam isn't in the direction of someone's eyes. But it doesn't stop people from looking at the laser pointer. If I'm pointing the output of the laser into the sky, is infrared still a safety concern? Is...