Starlight Instruments Holographic Attachment for Holographic Collimator
- Removable diffractive optical element for use in Glatter Holographic Collimators.
- The Howie Glatter Holographic Attachment covers a wider angle (21 degrees) than any other holographic collimator.
- Ten line by ten line grid standard pattern, enclosing eighty-one smaller squares.
- The Howie Glatter Holographic Attachment gives greater sensitivity for centering circular optics of arbitrary size.
- Produces a proportionately larger asymmetry in the intersection points of the grid lines with the perimeter of the optic.
Howie Glatter Holographic Attachment
When it comes to lasers and collimation, one of the most trusted
names in the business is guru Howie Glatter. His uncompromising quality
and dedication to above average products, not only put his name above
the rest - but in demand as the finest available on today's market.
Usually a manufacturer doesn't take the time to explain to a customer
exactly why their product excels over others - or why it performs better
- but not Howie. Here's what he has to say about his new Howie Glatter
Holographic Laser Collimator Attachment:
The holographic collimator has a removable diffractive optical element
("hologram") placed in the beam, just ahead of the laser. It diffracts
light from the laser to project a diverging, symmetrical pattern around
the central beam which is quite useful for centering optical elements.
My standard pattern is an illuminated ten line by ten line grid, forming
a large square box enclosing eighty-one smaller squares. It covers a
wider angle (21 degrees) than any other holographic collimator, which
allows direct centering of f/ 2.7 to f/ 35 optics. It may seem
counter-intuitive, but the square grid pattern gives greater sensitivity
for centering circular optics of arbitrary size. If a mirror or lens is
decentered by only a small amount against the grid pattern, it produces
a proportionately larger asymmetry in the intersection points of the
grid lines with the perimeter of the optic. Cross-hair patterns do not
have this property.
The diffractors are individually fit to their collimators for maximum
alignment accuracy, so if you have one of my holographic collimators
and know someone else who has one, be careful not to switch diffractors.
If switched, 15 second alignment accuracy in the holographic mode is
likely to be lost, however, they will still fall within the several arc
minute alignment tolerance of most other laser collimators. Because
there are some collimating situations in which the diffracted pattern is
unnecessary or unwanted, or maximum power in the central beam may be
desired, the diffractor unscrews from the laser aperture, converting the
holographic collimator to single beam mode. When it is screwed back it
retains its alignment accuracy."
Accurate and Precise. What more could you ask?
