We are offering high quality optical prisms. Optical prisms are the blocks of optical material with flat and polished sides that are arranged in a precisely controlled angles to one another. Technical Specification

Prisms		Standard	Precision
	Material	BK-7/Fused Silica
Right Angle Prisms	Dimensional Tolerance	0.15 mm	0.02 mm
Penta Prisms	Surface Quality (Scratch & Dig)	80-50	20-10
Equilateral Prisms	Surface Flatness@632.8nm	l/2	l/10
Dove Prisms	Angle Tolerance	3 Min	<5 secs
Amici Roof Prisms	Bevel	0.2 mm x 45°
Anamorphic Prisms	Size Range	5 mm --- 100 mm
Corner Cube Prisms	Coatings	Al+SiO/ SLARMgF2

Optical windows are used to isolate different physical environment while allowing light to pass unimpeded.

Technical Specifications

	Standard	Precision
Material	BK-7/Fused Silica
Dimensional Tolerance	0.15 mm	0.02 mm
Surface Quality (Scratch & Dig)	80-50	20-10
SurfaceFlatness@632.8nm	l/2	l/10
Angle Tolerance	3 Min	<5 secs
Bevel	0.2 mm x 45°
Size Range	5 mm --- 100 mm
Coatings	Al+SiO/ SLARMgF2

At- Prisms India Private Limited manufactures complete range of optical mirrors. It is widely used in a range of optical, laser and imaging applications.

Technical Specifications

Mirrors		Standard	Precision
	Material	BK-7/Fused Silica
Concave Front Surface Mirrors	Dimensional Tolerance	0.15mm	0.02mm
Elliptical Front Surface flat Mirrors	Surface Quality(Scratch&Dig)	80-50	20-10
Plano Mirrors	SurfaceFlatness@632.8nm	l/2	l/10
	Angle Tolerance	3Min	<5secs
	Bevel	0.2mmx45°
	Size Range	5 mm --- 100 mm
	Coatings	Al+SiO/SLARMgF2

Optical flats are polished flat surfaced device used as references against which the flatness of an unknown surface may be compared.

Technical Specifications

Material	BK-7/Fused Silica
Surface Quality	80-50
Surface Accuracy	l/4,l/6,l/10@632.8nm
Second surface	l/2@632.8nm
Angle Tolerance	<5 minutes
Bevel	0.3mm x 45°

Part No (Prefix A for Fused Silica)	Diameter (mm)	Thickness (mm)
OF-25	25	10
OF-30	30	12
OF-50	50	15
OF-75	75	20
OF-100	100	25
OF-125	125	30
OF-150	150	35

• Accompanied by Flatness Inspection Report
• Cosmetic Defects: According to US MIL Std
• Supplied in Wooden Box
• Inspection carried out in Laser Fizeau Interferometer with 100 mm diameter Reference Flat (/20) traceable to NIST
• Evaluation of flatness conducted with Licenced Quick Fringe Software

Applications:

Inspection of flatness of Mechanical Seals, Pump Valves, Lapped Components

We offer high quality optical parallel for use in large capacity switches, routers and data transport equipment.

Technical Specifications

Material	BK-7/Fused Silica(SuffixA)
Dimensional Tolerance	¡Ó0.15 mm
Thickness Tolerance	¡Ó0.01 mm
Surface Quality	80-50
Surface Accuracy	0.2 microns
Parallelism	0.1 microns
Bevel	0.5mmx45¢X

Part No	BK-7/Fused Silica(SuffixA)	Thickness (mm)
OP-01/ OP-01A	30 mm	12.000, 12.127, 12.250, 12.375
OP-02/ OP-02A	50 mm	25.000, 25.127, 25.250, 25.375

• Accompanied by Flatness Inspection Report
• Cosmetic Defects: According to US MIL Std
• Supplied in Wooden Box
• Inspection carried out in Laser Fizeau Interferometer with 100 mm diameter Reference Flat (ƒÜ/20) traceable to NIST
• Evaluation of flatness conducted with Licenced Quick Fringe Software
• Parallelism Inspection by Haidenger Fringe method using special Software

Application

Inspection & Calibration of Flatness of Micrometer anvils.

Avail from us, superior quality laser Inferometers for linear measurements.

Features

• Small size and low weight
• Easy beam alignment
• Easily transportable
• Simple operation
• High resolution
• High precision
• Low price

Applications

• Positioning of CNC and CMM
• Machine geometry Inspection
• Flatness Measurement
• Angular Positioning
• Ball Screw Inspection
• Servicing Application

Technical Specifications

Measurement	Range	Resolution	Accuracy
Distance	0-30 m	0,01 µ m(0,001 µm)*	1,5 µm/m
Velocity	0-0,3 m/s (0,1 m/s)	0.25 µ m/s	0,1%
Angular	0-3600 arc sec	0,04 arc sec	±0,2%
Straightness Measurement (with angular optics)	0-12 m	0.02 µm (for 100 mm base)	± 1%
Flatness ***	0-12 m (± 3 mm) ± mm flatness measurement range)	0,02 µm ( for 100 mm base)	±1%
Straightness measurement (with wollaston prism )	0-3 m	0.01 m	± 1%
Squareness	± 1000 arc sec	0,03 arc sec	±1% ± (1,5 arc sec)
Rotary measurements	±5°	0,04 arc sec	±0.2 %

The maximum velocity for 0.001 µm resolution is 0.1 m/s, the 0-15 m range request, moody method and grid method.

Flatness measurement interferometer set-ups such as this, are used for the metrology of surface flatness of plano elements such as mirrors, prisms, windows & lapped mechanical components. This is a non-contact measurement, unlike using Optical Flats by contact method, wherein the reference Optical Flat is damaged after constant usage.

The transmission/ reference flat serves as a reference which is compared with the test component.

The basic Interferometer has two operating modes Alignment Mode & View mode. In the Alignment mode, the integral tilt-table is adjusted to superimpose the images on the video monitor. View mode yields high contrast fringes.

From the fringe pattern, the flatness of the test component is evaluated.

Technical Specifications

Orientation	Vertical
Light Source	He-Ne Laser at 632.8nm - Imported
Reference Flat Accuracy	l/10 with NIST Traceability
Work Table (Tilt Table) Dimension	8" x 8"
Warm-up time	< 10 minutes
Power	220V,50Hz
Weight	Approx 40 Kgs

• Colour / Mon Video Monitor
• CCD Camera
• Selection Mode for rapid Alignment and Fringe viewing

Model	Vertical Model
LFI-100/V	100 mm Vertical Model
LFI-50/V	50 mm Vertical Model

Optional Accessories

Static Quick Fringe Analysis Software & Frame Grabber.

We offer Michelson Interferometer for optical interferometry.

Michelson Interferometer Setup

• Determination of wavelength
• Refractive index of transparency slide
• Precise comparing of wavelengths
• Refractive index of air
• White light fringes
• Interference fringes
• Equal thickness fringes

Fabry-Perot Interferometer Setup

• Multiple beam Interference
• Equal inclination fringes

Twyman-Green interferometer

• Demonstration of Twyman-Green interferometer

Combination of Michelson & Fabry Perot Interferometer is Universal Interferometer.
Combination of Michelson, Fabry Perot & Twyman Green Interferometer is precision interferometer.

It is an optical instrument used for non-contact measurement of angles. They are used to align components & measure deflections in optical or mechanical systems. An autocollimator works by projecting an image on to target mirror, and measuring the deflection of returned image against a scale.

Educational Use

Model	Resolution
ACT-01S	3.0 Secs
ACT-02D	1.0 Sec

Industrial Use

Model	Resolution
ACT-03D	1.0Sec
ACT-04D	0.5Secs
ACT-05D	0.2Secs

List of Accessories

• Standard Reflector
• Custom Built Reflector
• Penta Prism Std/ Precision
• Optical Polygon Std/ Precision
• Metal Polygon

Application

• Calibration of Rotary Tables
• Calibration of Surface Plates
• Alignment of Machine Beds
• Straightness Inspection of Table Movements
• Measurement of Squareness & Parallelism of Machine Guideways

We offer Interference Autocollimator for the measurement of flatness of lapped & polished mechanical components.

Features

• Technical mass products with flat surfaces specified to be better than 0.1 µ m, over a few cm, are produced by millions per month
• The production processes are lapping & polishing– and, increasingly more often, Micro machining; 90% have diameters under 50 mm.
• ISO 9000 requires tight inspection often 100%
• The most common tool for this is The Interferometer– having an esteemed value for engineers, as does the stethoscope for the medical practitioner.

We offer all types of alignment autocollimator. Serves as a Alignment Telescope and an Autocollimator. Used for alignments of various points along a reference line as well the orientation/ angular tilt in two axis.

Application Area

• Aerospace Industry
• Bore Alignment
• Gear Box Axis Alignment
• Ship Building Industry
• Roll Alignment
• Automotive Industry
• Die Casting Industry
• Machine Tool Industry

Linear Resolution: 10 Microns shift @ 1 meter distance Angular Resolution: 1 arc sec.

Prisms India provides complete solution in design and fabrication of target fixtures to suit wide range of applications.

Wooden Frame with acrylic white sheet for diffused/ extended light of low pressure SOX Sodium Vapor lamp.

• Model MLS–1: Optical Flat to be placed on top of the specimen or component under test for viewing the light band from top.



• Model MLS-2: Specimen or the component under test is placed on top of the Optical Flat. The Light Bands or the fringe patterns are viewed through the mirror placed underneath the optical flat.

Applications

Used as a light source for Inspection of flatness of Mechanical Seals, Pump Valves, Lapped Components with Optical Flats.