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| OPTICS |
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| Astro
manufactures a variety of optical components as per customer
specifications. |
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Optical glasses like BK7, SF2, SF11, LaF5 etc |
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Opthalmic glasses |
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Low expansion glasses like Fused silica, Pyrex,
Duran, Zerodur etc. |
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Crystal
materials like Sapphire, NaCl, ZnSe, CaF2, Nd-Glass, Nd-YAG etc |
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Metals
like copper, aluminium, steel |
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Lenses
Windows
Prisms
Mirrors
Beamsplitters
Filters
Optical
Flats
Laser
Optics
Crystal Optics
Optical Assemblies
Special
Optics |
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Our
optics are available with
different kinds of THIN FILM COATINGS.
For details click here |
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Lenses |
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Windows |
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| Windows
are optical elements having where both the surfaces are plane in
nature. We can manufacture windows up to 200mm in size. Windows can be
coated with anti-reflection coating which increases the transmission.
They can be of general grade, just being optically polished or
precision grade, with control on the parallelism and flatness. We can
manufacture windows with parallelism of less than 5 seconds between the
surfaces and with flatness up to lambda/10 depending on the size and
thickness. We also supply windows with thickness as low as 0.1mm. |
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Prisms |
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Prisms
play an important part in any optical system. Their main function is to
deviate the beam of light in a different direction. They also
considerably shorten the light path of an optical system and can invert
and revert images, the reason for their being used in binoculars. They
can break up the light into its constituent colors. They are available
with anti-reflection coatings as well as other coatings as required.
Prisms can be made to high degrees of angular accuracy. |
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here for detailed description |
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Mirrors |
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| Mirrors are used for reflecting the light in
optical systems. They are can be designed for either normal or oblique
angles of incidence and can be partial reflectors or high reflectors.
They can have one curved
surface or both plane surfaces also. Telescope mirrors are examples of
aluminum coated mirrors. Dielectric coated mirrors can be used with
lasers and a variety of applications. |
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Beam splitters |
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Beam splitters partially
reflect / transmit the incident light. They are normally used at 45
degrees incidence. They split the laser beam in required R/T ratio.
They can either be in plate form (like a window) or in cube form. Cube
beam splitters have two right angled prisms of similar material
cemented together. One of the prisms has the beam splitter coating on
its hypotenuse. |
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Filters |
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Filters are used to "filter"
out light, i.e. to separate out wavelengths. They can be similar to
windows in size and shape. We manufacture filters of various types. |
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here for detailed description |
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Optical Flats |
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| We make Optical flats up to
lambda/10 accuracy from Pyrex or Fused Silica. |
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Laser Optics |
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A lot of use of optics is
related to lasers. There are many types lasers being used, with
different wavelengths. We can manufacture optics for any wavelength
from 250nm to 1064nm. We can provide beam splitters, mirrors, output
couplers, beam expanders, partial mirrors, focussing lenses. The optics
will have high
damage thresholds. The substrates have high degree of flatness and
better surface quality as compared to standard optics. |
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Crystal Optics |
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Apart from normal optical
glasses, we have also worked on crystal materials like NaCl,
CaF2, Sapphire, Germanium, ZnSe, LiNbO3 etc. |
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Optical Assemblies |
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Optical assemblies are an
integral part of any optical system. We have a fully equipped metal
working shop including a CNC lathe machine from Hardinge, USA to give
all kinds of optical mountings for our optics. We can make assemblies
as per your specifications. Assemblies are done on Class 100
workstations in Class 10,000 clean room. |
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Special Optics |
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Apart
from all the above listed optics, there are many other things that we
have worked on which do not fall under any standard category. Some of
them are as follows:
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Silicon
Carbide substrates - Grinding and polishing of silicon carbide to a
high degree of flatness and surface finish.
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Cuvettes
- We supply special cuvettes for use in milk meters. These have 2
components made from Pyrex. The tolerances on the thickness and the
parallelism are 4-6 microns. One of the component also has precision
drilled holes. We also supply 10 micron depth cuvettes for use in
analytical instruments.
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Quartz
Wafers - We have successfully supplied 0.2 mm thick quartz wafers
- Domes - We make quartz
domes for radiometers
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Acrylic
window polishing
- Photomask substrates
- Metal polishing
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