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VIS Optics

We are manufacturer of precision optical windows that are made from two flat polished surfaces. Custom fabrication can also be done by us, wherein the surfaces used are optically transparent. In all, there are 4 types of optical windows available that are Anti-Reflective (AR) Windows, Infrared (IR) Windows, Ultraviolet (UV) Windows and Visible Windows. These are manufactured using a double-sided process, which is extremely beneficial in yielding outstanding parallelism and transmitted wavefront. We use double-sided grinding and polishing machines to make these precision optical windows in different shapes, sizes and substrates. In line with this, these are used in biomedical and industrial purposes. Apart from this, the windows also find use in infrared and defense applications.

Optical Window Applications: These window permit passing of optical radiation from one environment to other alongside blocking all other elements, hence avoiding the mix. Also, it does not makes any alteration in the beam's wavelength distribution.

Their application areas are: Debris Shields, Instrument Windows, Laser Line Windows, Protective Windows, Sight Windows, Turret Windows, Vacuum Windows, Viewing Windows.
We manufacture different types of prisms such as Wedge Prism, Right Angle Prism, Penta Prism, Rhomboid Prisms, Roof Prism and others. These are provided with various coating options such as no coating and AR coating on entry as well as exit surface. Further, as per client's requests we can provide beam splitter or solver coating on the prism's reflective surface. Depending on type of prism selected by you, its angle tolerance can be within 1 or 5 arc seconds and dimension tolerance be either +/- 0.10mm or +/-0.20mm. The material of construction also differ from Bk7, CDGM H-K9L, N-BK7 / H-K9L, Sf11 to Grade A Fine Annealed to Fused Silica, Silicon, Germanium. The surface accuracy and roughness also vary from product to product. The range of surface quality is 60 to 10 scratch and dig (S/D).

About Prisms of Different Types:

1) Wedge prism works like wobble plate. Its vertex angle requires at least one minimum deviation.
2) It is very simple to install a right angle prism. But, it is tough to distort the exterior machine pressure.
3) Basic uses of penta prism are in instrumental applications such as alignment, optical tooling, surveying, etc.
4) Rhomboid Prisms are used for laser beam displacement, however the direction of beam is not changed.

Spherical Lens is available in spherical shape to focus beam as well as expansion. As the lens doesn't focus parallel rays to a common point, its "focus" depends on the distance from the centre of the lens. This phenomenon of "focus shift" helps focusing the image with the diaphragm that is wide open. It is widely used in different applications; hence it should be selected carefully. It should be chosen on the basis of f/number, conjugate ratio, lens material, transmission, etc. In addition, wave front distortion, types of coating and scattered light also keep in mind.

This precision lenses is developed from high-quality optical materials for high transmittance. It is designed with careful considerations to ensure to provide the fine shape to the lenses and shapes. It is available with high surface exactness and surface quality. It is used as shaving mirrors, reflectors in the headlights of vehicles, street light bulbs, search lights, etc.

Features of Spherical Lens:

1) High quality anti-reflection coatings are available.
2) Designed to suit a range of wavelengths from UV, visible, NIR, and MIR.
3) Available with positive focal length in best-form shape.
4) Damage proof design with fine cut and shape.

A cylindrical lens is designed to focus light into a line with its curved face. The faces of the lens are its different sections that focus the image into a line parallel to the intersection and a plane tangent to it. The lens carefully compresses the image in the direction perpendicular to this line. It leaves it unaltered in the direction parallel to the tangent plane. This cylindrical lens is kept in front of the illumination object to produce the light sheet that is further used in imaging.

This cylindrical lens is designed for a range of applications that need one-dimensional shaping and direction of the light source. It is available in plano-concave or plano-convex configurations that are designed for expanding or focusing light. This offered cylindrical lens is available in uncoated or anti reflection coated materials to ensure to provide the best performance.

Features Of Cylindrical Lens:

1) Available with differing radii in the X as well as Y axes.
2) Image magnification is done only at a single axis.
3) Widely used to adjust image height size or as laser line generators.
4) Ideal for astigmatism in imaging systems.

An Aspherical Lens has surface profiles. The prime benefit of the lens is to correct the spherical aberration and create an optical effect that makes the incident light rays focusing at different points while developing an image. This focuses light to a small point for ensuring no blur and improving the quality of the image.

It is used to replace complex multi-lens system to get smaller as well as lighter product. It is also employed to reduce aberrations in multi-element wide-angle as well as fast normal lenses. In addition, it can be used in combination with reflective elements and for collimating diode lasers. Its eyeglass lenses allow crisper vision while looking in different directions than the lens optical center. Its ability to reduce the magnification effect helps individuals to have different powers in the 2 eyes (anisometropia).

Features of Aspherical Lens:

1) Perfectly designed lens that minimizes aberration by correcting the conic constant as well as aspheric coefficients.
2) Allows optical designers to make the aberrations correct using elements.
3) Ensures to provide better optical results and reduces the overall cost of production.
4) Ideal to produce a wider field of view with improved peripheral vision.

Ball lens is a great optical component developed to enhance the signal coupling among detectors, fibers and emitters. This lens is designed using a single substrate of glass to focus or collimate light according to the input source’s geometry. It is widely used in ball pre-forms for aspheric lenses, imaging optics systems, endoscopy, projection optics systems, bar code scanning, astronomical optics, sensors and other applications. It is available with higher spericity of more than 0.6m with uniformly and precisely ground design. In addition, it is available with outstanding surface roughness to ensure to provide accurate and required results.

This is designed from BK7 Grade A Optical Glass having dimension tolerance is ± 0.002mm. The sphericity of the lens is up to 0.6μm. In addition, this lens is available in different coatings available in varied specifications provided by the users.

Features of Ball Lens:

1) Spherical lenses widely used to couple light in and out.
2) Available with outstanding UV and IR transmission in the ranges between 185nm to 2000+nm.
3) Provided in alternative materials and diameters.
4) Ideal to be used in fibre coupling applications, endoscopy, laser measurement systems, etc.

Mirror has a flat or planar reflective surface. It creates images of objects kept in front of it. It works on the principle of creating images in behind the plane. It produces virtual and upright images of the same shape as well as size as the object. Its optical power is zero and focal length is infinity. It is designed to be used in a variety of applications from beam steering, lab or OEM integration, folding to interferometry. In addition to this, it is also used within imaging systems as optical component. As surface flatness is a dimension of the surface’s roughness, high surface flatness reduces the light lost quality through dispersion.

It is provided in standard metallic mirror coatings using different materials from Gold, Silver, Aluminum, or Dielectric. It is also available with Fused Silica or other substrates to make it ideal to be used at the places where temperature fluctuation is the point.

Features of Mirror:

1) Available with different reflection coating options from gold, silver to aluminum.
2) Ensure enhanced durability and strength with a protective layer of dielectric overcoat.
3) Designed in different surface flatness from λ/4 to λ/20.
4) Available in standard or precision design in varied surface flatness, substrates, sizes, and other parameters.

Beamsplitter is an optical component widely used to split the incident light into two separate beams at a designated ratio. This is developed from high grade glass materials having laser grade surface flatness. It comes with high surface quality for tighter tolerance. It is widely used to join two different beams into a single one. It is designed to offer general purpose laser beamsplitting as well as merging visible through near infrared usages.

It is available in two types as per their construction such as cube or plate. Cube beamsplitter is available in polarizing as well as non-polarizing models. On the other hand, the plate beamsplitter is available with a coated front surface to determine the beam splitting ratio as the back surface is wedged as well as AR coated for minimizing the ghosting along with interference effects.

Features of Beamsplitter:

1) Provides excellent wave front transmission property.
2) Ensure to remove beam offset and ghosting.
3) Highly compatible with different lens tube and cage systems.
4) Highly valuable to be used for combining laser beams of different colors.

Optical Filter is a device that transmits light selectively of different wavelengths. It is used as a plane glass or plastic devices in any optical path. The optical properties and features of the filter are shown by its frequency response that fuehrer demonstrates the degree and phase of each frequency component.

This selectively transmits light in a fixed range of wavelengths. It can easily pass long wavelengths, short wavelengths or band of wavelengths that blocks shorter as well as longer wavelengths. The created passband is wider or narrower and the transition between maximal and minimal transmission is sharp or gradual. This is widely used for photography in many optical instruments, scientific and technical work.  It is also used in astronomical domain for restricting light passed to the spectral band of interest. In addition, it has also become a vital part in fluorescence applications like fluorescence microscopy and spectroscopy.

Features of Filter:

1) Ideally used in clinical chemistry, life science, imaging, defense and other sectors.
2) Highly durable design with hard coatings.
3) Excellent optical densities with utmost performance.
4) Even transmission of a part of the spectrum.

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