to the Lockwood
Custom Optics web site. My
name is Michael Lockwood, and I started LCO in 2006 to supply quality
optics to amateur and
professional astronomers, telescope builders, scientists, researchers, and industry.
telescope mirrors, up to 60" in aperture, F/2
and Ritchey-Chretién systems
flat mirrors, LIDAR mirrors, and industrial optics
- Testing and refiguring
for systems up to 60" in aperture
I answer Frequently Asked Questions here (FAQ).
I describe Recent or Notable Projects here.
I list my Articles, Talks, and Presentations here.
I specialize in high quality custom
(rather than doing large production runs of one type of mirror) because
I believe in
giving each optic individual attention in figuring and testing to make
it the best it can possibly be. I also understand that
custom optics are not easy to find, and I want to be a dependable source.
I can measure significant
error in a mirror compared to the ideal or the specification, it
is simply not good enough, and must be worked further. This
the philosophy I follow for every optic that passes through my shop.
am a source
for difficult to find, high-quality optics and
services such as:
primary mirrors - up to 60" diameter, F/2 and
- Optics from lightweight cast cellular blanks (Note: I do not make blanks)
Cassegrain optical systems (Dall-Kirkham, classical, and Ritchey-Chretien)
elliptical and round flat mirrors
matched primary optics for binocular reflecting telescopes
- Testing and
refiguring of flats and assembled telescope systems
customer service, I specialize in:
integrity, and quality
with my clients, whether problems arise or not
clients updated on project progress
products in a timely manner
in scheduling and custom services, and
clients with information on how to best use my products
Other important notes
can currently provide
mirrors up to ~42" in diameter from high-quality, precision
monolithic borosilicate glass up to 2.5"
in thickness. This is very good glass, and it is
with little wait. I will help to make your large-aperture
telescope a reality and
Small mirrors - I
prefer to make new monolithic mirrors that are 14.5" or larger.
For 8" - 14" optics, I highly recommend Carl
refigure mirrors as small as 10". I work cast cellular blanks and flats in just about
any size. I do not make small flats, and I prefer to refigure flats over approximately 3" in diameter or minor axis.
Mirror cell testing
can also provide some testing and validation results for the edge
support of a mirror cell, a useful and often vital testing
that many telescope builders have never even considered, and which is
very important for large, thin mirrors. I very rarely see back
supports that work improperly, however I frequently see mirror cells
with improper edge supports that can compromise the optical performace of
any mirror that they hold.
and typical work: I
have considerable experience in working thin mirrors, cast cellular
mirrors, and sub-F/4 optics, and combinations thereof. I make
custom focal ratios and can
supply a specific focal length to close tolerance if required.
optics, so I generally don't have finished
mirrors in stock. However, I usually have some generated mirror
blanks that are ready for work. For a list of
any items that I may have in stock, please click
here, and see if that gives you some project ideas.
my work is for the clients listed on my Clients page, and I thank them for choosing to work with me based
on the quality of my work, adaptability to meet their needs, timely
delivery, and dependability. My Projects Page lists many, but not all, of the other projects that I have been involved with.
Due to a limited supply of 20" quartz blanks, 20"
f/3.3 quartz mirrors are, at this time, exclusive to Starmaster.
Other custom focal ratios can be made if the material is
you have a project that requires
high-quality optics done
right the first time, or a mirror that needs refiguring or
testing, please email me at:
mirrors (at) loptics (dot) com
EMAIL (in general) DOES
NOT ALWAYS WORK! Technology has made
communication easier, but certain email addresses are blocked by
certain filters, messages sometimes simply disappear, and that is not
your or my fault.
If you've tried to contact me and haven't heard back, there is a
significant chance that the email got eaten by the internet or a spam
filter. Trust me - I may be busy, but I am NOT ignoring you.
Also, remember that I may occasionally be on vacation and away
from internet service.
you don't get my reply within a week, please join my Yahoo group and post a
message there. If you can see the message, then so can I, and
I can respond.
shipments/payments, my shipping and mailing address is:
IL 61864 USA
Important events and firsts
Note: Many of the first/events described below are listed on my Projects Page.
was founded in 2006. In 2007, I began making thin
monolithic primary mirrors for Dream Telescopes. These were
Pyrex, 16.5" in diameter, 1.25" thick, and at that time no one was
making such thin mirrors commercially.
In early 2008, Dream switched to cast cellular blanks, so I bought the
blanks and began making these mirrors for Starmaster Portable
Telescopes. They proved to be a sensation in the visual telescope
market. It was the first production visual instrument to combine high-quality, fast, and thin optics. This telescope allowed seated (comfortable!) observing all over the sky. More on these mirrors can be seen on this page. This was called the FX Series of Starmaster Telescopes.
Later in 2008, I made the first 20" f/3 mirror for visual use, an unheard-of 1.25"-thick, made from Pyrex.
Five years later, I am still the only optician making such a
mirror. Starmaster Portable Telescopes built the structure, and
it is still my main visual instrument. I called it the 20" f/3 MX
telescope, MX standing for "Mike's eXperiment". Three
articles have been written about this instrument:
look at the Starmaster 20" f/3
with the 20" f/3 in Missouri, The 20" f/3 goes to Florida and WSP 2009,
and it has been featured in columns in Astronomy Magazine and Sky and
Telescope. In 2013, JPAstrocraft built a highly customized 20"
f/3 for a client using my optics. (In recent years, others have
copied it, but I did it first and with the thinnest, fastest-cooling
availability of TeleVue Ethos eyepieces and later the Paracorr Type 2,
telescopes at f/3.6 and faster could be enjoyed by all telescope
buyers. (When the 20" f/3 was built, the eyepieces and
correctors had not quite caught up to the drop in f/#.) With the
and Paracorr Type 2, the 20" f/3 performed beyond my expectations.
So, in early 2009, I made the first f/3.3 primary mirror for a commercial visual telescope,
a 22" f/3.3. It was made from 1.4"-thick Pyrex. The
telescope was built by Starmaster Portable Telescopes, and the f/3.3
telescopes were called the Super-FX series.
Later in 2009, I produced a 30" f/3.3 for Starmaster, and the owner
raved about its performance. Soon, other opticians were offering
mirrors at f/3.3, but I did it first. 24" f/3.3 and 28" f/3.3
mirrors were also offered to fill in the range of sizes.
Also in 2009, I made a 14.5" f/2.55 mirror for an experimental visual
instrument that I built. Visually it was a success, and is my
favorite instrument for scanning the Milky Way that I have ever used.
An article about it can be seen here.
In 2010, I moved to a new, larger shop. I
chose to do this to allow work on larger, heavier mirrors, to reduce my
lead time, and to increase my production and testing
capability, all while maintaining the same high standards.
In the middle of 2010, I produced the first 20" f/3.3 mirror from 1.25"-thick quartz.
It was offered exclusively in a Starmaster telescope with a 4.5"
quartz secondary mirror. This Starmaster model is called the
In 2011, I made a 28" f/2.75 mirror, another first.
The telescope was built by Webster Telescopes, and the owner
reported superb performance from an instrument that only needed one
step at zenith! In 2012, I received an order for a 28" f/2.8, to
be built by SDM Telescopes in Australia. A 32" f/2.8 is also now on order, as well as a 40" f/3.