Optical Glasses Manufacturer,Supplier and Exporter in India
Product Code : EL-SLE-5809
Jlab Export is a leading Optical Glasses Manufacturer,and suppliers in India
Optical Glasses (code EL-SLE-5809) are Perspex optical blocks, listed as 19 mm thick, in rectangular, equilateral-triangle, right-angled triangle, circular, biconvex and biconcave shapes. Used with a ray box, they let students trace how light refracts, deviates and is totally internally reflected in school and college optics practicals. They are made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Material | Perspex (acrylic) |
| Thickness | 19 mm (listed for the Perspex blocks) |
| Rectangular block | 114 × 73 mm |
| Triangular block, 60 degrees | 76 × 76 × 76 mm |
| Triangular block, 30, 60 and 90 degrees | Size not stated in the listing |
| Circular block | 98 mm diameter |
| Biconvex blocks | 140 × 178 mm and 140 × 98 mm |
| Biconcave block | 140 × 98 mm |
| Quality check | Each block is visually inspected before dispatch |
| Pack quantity | Each — state whether you need the full range of listed shapes or individual blocks |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-SLE-5809 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Do They Compare with JLab Glass Blocks?
| Item | Material | Listed shapes and features |
|---|---|---|
| Optical Glasses (EL-SLE-5809) | Perspex (acrylic) | Rectangular, two triangular, circular, two biconvex and one biconcave block; 19 mm thick |
| Glass Blocks | Clear glass | Plain pattern; different shapes |
| Glass Block (Rectangular) | Glass | Rectangular with bubble-free surfaces; listed in two sizes |
Choose the Perspex blocks when you want the lens-shaped pieces as well as blocks and prisms, and a material that is lighter than glass and less likely to shatter when dropped. Choose the glass blocks where the practical or exam board asks specifically for a glass slab.
What Are the Perspex Optical Blocks Used For?
Each shape demonstrates a different idea when a narrow ray from a ray box is aimed at it on a sheet of paper. The rectangular block shows that a ray leaving a parallel-sided block runs parallel to the ray entering it but is shifted sideways, and tracing the rays lets students work out the refractive index. The 60-degree triangular block deviates the ray as a prism does, so students can find the angle of deviation and its minimum. The right-angled block reflects light totally inside it when the ray meets a face beyond the critical angle, and the biconvex and biconcave blocks show in two dimensions how a converging lens brings parallel rays to a focus and a diverging lens spreads them. These match the class 10 practicals on the path of a ray through a slab and a prism, and the ray optics topics of class 12, which makes these blocks a useful optics experiment kit for schools and college labs.
Acrylic scratches more easily than glass and is attacked by many solvents, so clean the blocks with a soft, damp cloth only, never with abrasive powders or solvent cleaners, and store them so the polished faces do not rub against each other.
What to Specify When Ordering
- Shapes — say whether you need every listed shape or only some, such as the rectangular block and the 60-degree prism for class 10 practicals.
- Sizes — the right-angled block’s size is not stated; ask JLab if your tender sets a size.
- Quantity — the minimum order is 10 units; schools often plan enough blocks for each pair of students to have the shapes they need.
- Light source — add a ray box to the same enquiry if your lab does not already have one.
Frequently Asked Questions
What are these optical blocks made of?
They are made of Perspex, a clear acrylic. The product is named “Optical Glasses”, but the blocks are acrylic, not glass.
Which shapes and sizes are listed?
A rectangular block of 114 × 73 mm, a 60-degree triangular block of 76 × 76 × 76 mm, a 30, 60 and 90 degree triangular block, a circular block of 98 mm diameter, biconvex blocks of 140 × 178 mm and 140 × 98 mm, and a biconcave block of 140 × 98 mm, listed as 19 mm thick.
Are they sold as a set or one by one?
The listing names all the shapes under one product but does not say whether they are sold together. State in your enquiry whether you need the full range or particular blocks.
Can they replace a glass slab and glass prism in class 10 practicals?
They show the same refraction effects and are traced in the same way. If your syllabus or exam board names a glass slab or glass prism specifically, use JLab’s glass blocks instead.
Is a ray box included?
No ray box is listed with the blocks. JLab ray boxes are separate items, linked below, and can be added to the same enquiry.
Who manufactures these Perspex optical blocks?
Jain Laboratory Instruments Pvt Ltd (JLab) makes them at its works in Ambala, Haryana, India, and quotes for them directly.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, an Indian manufacturer of optics and school science equipment, incorporated in 2017 and operating from Hargolal Road, Ambala, Haryana. The optical blocks are made at JLab’s own works rather than bought from a trader, so schools, colleges, dealers and importers order them factory-direct, every block is checked by eye before it is packed, and repeat orders are made by the same maker. JLab exports worldwide and ships to buyers in every region — for example Congo in Central Africa, Papua New Guinea in Oceania, Tajikistan in Central Asia, Liberia in West Africa and Brunei in Southeast Asia. Tender details are on the JLab lab tenders page.
Ray Boxes and Other Refraction Items
- Ray Box Kit — a light ray box with slits for producing the narrow rays these blocks need.
- Ray Box (Metal) — gives single and multiple rays and parallel beams for the lens-shaped blocks.
- Prism Glass — glass prisms in right-angle and equilateral forms.
- Glass Block (Rectangular) — a bubble-free glass slab for refraction practicals.
More optics lab equipment is in the School Lab Equipment range.
Request a Quote
Quotes come direct from the manufacturer. Use the Add To Cart enquiry button on this page, or send the quantity (minimum 10 units), the shapes you need, any ray boxes, and your delivery city or port through the contact page.
Last updated: 4 October 2026
