Light & Optics Manufacturer, Suppliers and Exporter in India
School Instrument India is leading Light & Optics Manufacturer,and supplier and Exporter in India, Algeria (Algiers), Angola (Luanda), Argentina (Buenos Aires), Armenia (Yerevan), Australia(Canberra), Austria (Vienna), Bahrain (Manama), Bangladesh (Dhaka), Bhutan (Thimphu), Bolivia (Sucre), Botswana (Gaborone), Brazil (Brasília), Brunei (Bandar Seri Begawan), Montenegro (Podgorica), Morocco (Rabat), Mozambique (Maputo), Myanmar (Naypyidaw), Namibia (Windhoek), Nepal (Kathmandu), New Zealand (Wellington), Nigeria (Abuja), Oman (Muscat), Palestine (Ramallah), Panama (Panama City), Papua New Guinea (Port Moresby), Paraguay (Asunción), Peru (Lima), Philippines (Manila)¸ Portugal (Lisbon), Qatar (Doha), Rwanda (Kigali), Saudi Arabia (Riyadh), Senegal (Dakar), Serbia (Belgrade), Sierra Leone (Freetown), Slovakia (Bratislava), South Africa (Cape Town) (Pretoria) (Bloemfontein), South Sudan (Juba), Spain (Madrid), Sri Lanka (Sri Jayawardenepura Kotte) (Colombo), Sudan (Khartoum), Syria (Damascus), Tanzania (Dodoma), Thailand (Bangkok), Togo (Lomé), Tonga (Nuku'alofa), Trinidad and Tobago (Port of Spain), Tunisia (Tunis), Turkey (Ankara), Turkmenistan (Ashgabat), Uganda (Kampala), United Arab Emirates (Abu Dhabi), United Kingdom (London), United States (Washington, D.C.)
Palak Mall, Senior Content Writer, wrote this page and Arvind Kumar, Lab Equipment Specialist with 12+ years in laboratory supply, reviewed it on 14 October 2026
Light & Optics on School Instrument India lists 105 items for school and college physics laboratories across seven sub-ranges. The range covers three different ways of teaching optics — ray boxes and kits for qualitative class work, optical benches for quantitative measurement, and standalone instruments such as spectrometers and polarimeters. The largest sub-range, Optical Bench & Accessories with 26 items, is almost entirely accessories that need a bench to sit on. All dimensions, focal lengths and materials below are the figures printed on the linked product pages.
The seven sub-ranges
| Sub-range | Items | What it covers |
|---|---|---|
| Optical Bench & Accessories | 26 | Wooden and aluminium benches, plus riders, lens and grating holders, slits, iris diaphragm, cross wire, object and candle needles, ground-glass and pin-hole screens, prism table, laser and lamp light sources, low-voltage power, spare bulbs. |
| Apparatus & Kits | 19 | Ray optics kits, light boxes, colour-mixing boxes, pin-hole cameras, Newton's disks, a functional human eye model, reading telescope, rotatable optical disc, spectroscopes, salinity refractometer, lamp houses including sodium and mercury spectral lamps. |
| Magnifier and Mirror | 18 | Plane, concave, convex and cylindrical mirrors in 50 mm and 75 mm diameters with stated focal lengths, mounted and unmounted, mirror support blocks, folding loupe and hand magnifiers. |
| Polarisation and Prisms | 17 | Polarimeters including a Laurent half-shade type, polaroid filters, hollow and solid glass prisms, perspex and acrylic prisms and blocks, rectangular and semi-circular blocks, seven-piece block sets. |
| Gratings & Filters | 10 | Transmission diffraction gratings in five line counts, a grating slide, colour filter sets, and diaphragms with single, double and multiple slits, discs and holes. |
| Lenses | 10 | Unmounted spherical lenses in 38 mm and 75 mm, double concave and double convex, cylindrical lenses, three lens-holder types, Newton's ring apparatus and microscope. |
| Spectrometers and Spectrum Tubes | 5 | Standard and intermediate spectrometers, Geissler spectrum tubes and their high-voltage power supply. |
The Three Optics Routes
Almost every decision in an optics order follows from one choice: how the subject will be taught. The three routes below need different equipment, in different quantities, at different prices. Mixing them unintentionally is how a department ends up with a single bench shared by thirty students, or with thirty ray boxes and no way to measure a focal length.
| Route | What it suits | What to order |
|---|---|---|
| 1. Ray box and kit | Qualitative class work on reflection, refraction and colour mixing. Several sets per class, students working in pairs. | Ray Optics Kit, Light Box and Optical Set, acrylic block sets, colour filters, Newton's disk. No bench needed. |
| 2. Optical bench | Quantitative measurement — focal lengths, image formation, magnification. One bench per group of students. | A bench (wooden 1.5 m or aluminium) plus the riders and accessories it carries, from Optical Bench & Accessories. Count accessories per bench, not per class. |
| 3. Standalone instrument | Senior and degree-level measurement of wavelength, optical rotation and angle. | Standard Spectrometer, Laurent half-shade polarimeter, reading telescope, Geissler spectrum tubes with their power supply. Usually one or two per department. |
The two benches differ in how accessories mount. The wooden bench is listed as a 140 mm wide baseboard with a 1.5 m scale divided in millimetres and six sliding moulded bases of 100 x 50 mm, each with an index line, brass pillar and locking screw, supplied with a lamp house, object needle and holders. The aluminium bench uses tilt-proof riders that take standard accessories on a 6 mm brass rod, with accessory height adjusted by a metal screw knob.
Diffraction gratings: choose by line count
Five transmission gratings are listed, all mounted on a glass carrier at 38 mm x 50 mm. The line count is the only difference that matters, and it determines which experiments are possible: low counts give widely separated orders suitable for showing diffraction, while high counts are needed to separate closely spaced spectral lines.
| Grating | Lines | Typical use |
|---|---|---|
| Diffraction Grating 100 Lines | 100 | Demonstrating diffraction and interference with widely spaced orders. |
| Diffraction Grating 300 Lines | 300 | Introductory diffraction work with a brighter, more separated pattern. |
| Diffraction Grating 1000 Lines | 1,000 | General spectroscopic examination of a continuous source. |
| Diffraction Grating 7500 Lines | 7,500 | Higher-resolution spectroscopic work. |
| Diffraction Grating 15000 Lines | 15,000 | The highest count listed, for separating closely spaced spectral lines. |
A diffraction grating slide is listed separately and carries three gratings on one frame at 100, 300 and 600 lines/mm, for demonstrating the relationship between line spacing and diffraction angle in a single piece. The optical bench gratings holder is the mount if a grating is to be used on a bench rather than hand-held, and is listed as a centred circular aperture in a square metal sheet with two clips to take different sized gratings.
Mirrors, lenses and blocks
| Item | Detail as listed |
|---|---|
| Lenses 38 mm, Set of Six | Six unmounted spherical lenses in optically worked plate glass with polished faces and ground edges, for exploring lens properties, reflection and refraction, and lens combinations. |
| Concave Mirror 75 mm, FL 300 mm | Spherical, optically worked, back heavily silvered, unmounted. Concave mirrors are also listed at 50 mm, and at 250 mm focal length. |
| Convex Mirror, 50 mm, FL 100 mm | Spherical, optically worked, back heavily silvered, unmounted. Convex mirrors are listed in 50 mm and 75 mm diameters with focal lengths of 100 mm, 150 mm, 250 mm and 300 mm. |
| Acrylic Block, Set of 7 | Clear acrylic blocks 20 mm thick, all surfaces fully polished, in a velvet-lined box: rectangle 75 x 50 mm, right-angle triangle with 75 mm hypotenuse, equilateral triangle of 57 mm side, semi-circle 75 mm diameter and a bi-convex piece of 75 mm radius. |
| Prism, Glass, Different Angles | Clear fully polished glass prism, angles 90° x 60° x 30°, hypotenuse 58 mm, height 32 mm. |
| Newton's Ring Apparatus | A plano-convex lens of 63 mm diameter and 2,000 mm focal length on a flat glass plate of equal diameter, both enclosed in a metal ring frame with equispaced compression adjusting screws to ensure correct contact. |
Prisms and blocks are listed in glass, perspex and acrylic. Glass gives the higher refractive index and the cleaner demonstration; perspex and acrylic survive being dropped by a class. Both are listed in rectangular, semi-circular and equilateral forms, so a department can order glass for demonstration and acrylic for student hands.
Light sources and spectral work
- Spectral lamps — the Apparatus & Kits sub-range lists a lamp house and control unit, a sodium (Na) lamp house with control unit, and a mercury (Hg) spectral lamp, which are what make quantitative wavelength work possible.
- Geissler Spectrum Tubes — evacuated glass tubes about 20 cm long in straight form, filled with different gases, with metal cap electrodes at both ends for a high-voltage supply and a fine capillary about 50 mm long in the middle. A matching power supply is listed separately and is required.
- Standard Spectrometer — listed as economically priced but capable of quantitative work, with collimator and telescope bodies as heavy castings and other metal parts bright plated.
- Direct Vision Spectroscope — a fixed-slit instrument supplied with a case, listed as suited to qualitative work on emission and absorption spectra where a wavelength scale is not required. The cheaper route when no measurement is needed.
- Optical Bench Laser Light Source — encased in a metal body on a standard 6 mm chromed rod, operating from a 1.5 V AA battery, listed as needing no power supply or bulbs.
Demonstration pieces worth noting
- Human Eye, Functional for Demo — a working model for demonstrating the physical principles of the eye, including defects of vision and their correction, with actual images able to be projected.
- Rotatable Optical Disc — a sheet metal disc about 30 cm in diameter, painted white on top, with a clamping assembly underneath for mounting on a vertical support rod, for ray-tracing reflection and refraction.
- Pin Hole Camera — a polished wooden box with a ground glass screen at the rear and an adjustable sliding front carrying the aperture, overall about 150 x 100 x 100 mm.
- Newton's Disk — an aluminium platform with printed coloured segments, the yellow and green wedges narrower and the red and violet wider to account for the eye's sensitivity across the visible spectrum.
- Reading Telescope — rotates in both vertical and horizontal planes, mounted on an 18 mm diameter chrome-plated pillar 450 mm long on a heavy tripod base, focused by rack and pinion.
Specifying an optics order
Decide the route first, then count. Kits and blocks are counted per pair of students; bench accessories are counted per bench; instruments are counted per department. Institutional purchase orders, bank transfers and government e-tender payments are shown on the ordering pages as accepted from schools, colleges, universities and training institutions in India. The company further states that it supplies institutions across Asia, Africa and the Middle East. Anything going out to tender is handled on the Tenders page.
Three items in this range are supplied needing something else to work, and are worth listing explicitly in the enquiry: the Geissler tubes need their high-voltage supply, the gratings need a holder if they are to go on a bench, and the lenses and mirrors are listed unmounted, so lens and mirror holders or support blocks must be ordered alongside them.
Related supply groups
- Heat & Thermodynamics — calorimeters, conductivity apparatus and engine models.
- Electricity & Magnetism — circuits, meters, transformers and electrostatics, including the low-voltage supplies used with bench lamps.
- Mechanics and Fluid Mechanics — measuring instruments, motion apparatus and balances.
- Earth Science — globes, maps, relief and tectonics models, and field instruments.
- Contact — to pass on the item list and quantities for pricing.
Questions buyers ask
How many items are in the Light & Optics range?
105 across seven sub-ranges. Optical Bench & Accessories is the largest with 26, followed by Apparatus & Kits with 19, Magnifier and Mirror with 18 and Polarisation and Prisms with 17.
Which diffraction grating should be ordered?
It depends on the experiment rather than on quality. The 100-line and 300-line gratings give widely separated orders suited to demonstrating diffraction; the 7,500-line and 15,000-line gratings are the ones to use where closely spaced spectral lines have to be separated. All five are listed mounted on a glass carrier at 38 mm x 50 mm.
What is the difference between the wooden and aluminium optical benches?
The wooden bench is a 140 mm wide baseboard with a 1.5 m millimetre scale and six sliding moulded bases of 100 x 50 mm, each with index line, brass pillar and locking screw, and is supplied with a lamp house, object needle and holders. The aluminium bench takes tilt-proof riders mounting standard accessories on a 6 mm brass rod, with height set by a screw knob.
Are the lenses and mirrors supplied mounted?
No. The spherical lenses and the concave and convex mirrors are listed as unmounted, optically worked and, for the mirrors, heavily silvered on the back. Lens holders in clip and metal types, and mirror support blocks, are listed separately in Lenses and Magnifier and Mirror and need ordering with them.
Do I need a spectrometer or will a spectroscope do?
A direct vision spectroscope is listed for qualitative work on emission and absorption spectra where no wavelength scale is required, and comes with a case. If wavelengths have to be measured, the standard spectrometer is the instrument, with a prism table and heavy cast collimator and telescope bodies.
What is needed to run the spectrum tubes?
The Geissler tubes are evacuated glass tubes about 20 cm long with metal cap electrodes at both ends, and require a high-voltage supply. The spectrum tubes power supply is listed separately in the same sub-range and should be added to the enquiry.
Request a quotation
Send the item names, codes and quantities through the contact page, stating which of the three routes above the department is equipping and how many student groups it has, and a quotation covering packing and despatch will be returned against that list. Buyers may request current ISO certificate copies from School Instrument India.
