From wchast at gmail.com  Sun Jun 24 01:47:04 2018
From: wchast at gmail.com (Chuck Hast)
Date: Sun, 24 Jun 2018 00:47:04 -0500
Subject: [Laser] Keeping beam tight for short distance
Message-ID: <CADNfBV-6ZiYA8NtGmNvy0EoAQT_9C2x0OTuq6vofngqfb+LgqQ@mail.gmail.com>

I need to keep a beam as tight as possible. at least from about 15mm from
the aperture to
about 170mm from the aperture. Beyond that distance I do not care.

The diode is a Osram 515 nm 10mw diode. Diode aperture is 5um. I would like
to try to keep
the beam width as near to 5um as possible for the distance of 15 to 170mm
from the lens
aperture.

Any recommendations?

-- 

Chuck Hast  -- KP4DJT --
I can do all things through Christ which strengtheneth me.
Ph 4:13 KJV
Todo lo puedo en Cristo que me fortalece.
Fil 4:13 RVR1960