Nightime or daytime? What is it you want to do, for what purpose, and what is your budget?
What you are proposing will require and FDA variance as well because it is a Surveying, leveling and alignment (SLA)
type activity.
There is no hand held battery powered laser that will have < 1 or 1.5 mrad spec.
You will need a lab type laser + perhaps a beam expander to lower divergence as well.
Expect to pay a few thousand $ for the laser depending on wavelength and output power.
Not the kind of thing that can be done on a daydream playtime budget, for most people.
"The Food and Drug Administration regulates all laser products (hardware). In addition, under 21 CFR 1040.10, FDA regulates three uses/applications of lasers:
- Demonstrations including laser light shows and artistic displays
- Surveying, leveling and alignment (SLA)
- Medical
Demonstration lasers such as light shows, and SLA lasers are often used outdoors. For these two applications, anyone using Class 3B or 4 lasers (above 5 mW for visible wavelengths) must fill out
FDA Form 3147 to obtain a “variance.” The user describes the intended use and safety features in order to get permission from FDA to vary from the regulations.
Further, if the use is outdoors, FDA will not grant the variance unless the user submits a description of their laser operations to FAA using FAA Form 7400.2 and receives a letter of non-objection from FAA. In this indirect way,
demonstration/lightshow lasers and SLA lasers are the only outdoor uses of lasers that are required under Federal law to get permission in advance from FAA."
See:
http://www.laserpointersafety.com/rules-general/rules-outdoor/rules-outdoor.html
Have a look at CNI China here:
http://www.cnilaser.com/ They are less costly than US made high quality lasers.
Contact them directly with your requirements or talk with a US Distributor See:
http://www.cnilaser.com/Contact.htm
You can get an idea of cost here as they list prices:
https://www.ultralasers.com/lasers-series.php?cat=21
