Customizable 30-60-90 Degree Optical Glass Triangular Prism for Laser Optics

Product Description

Product Description

Working PrincipleA prism is a transparent object formed by two intersecting planes that are not parallel to each other, used for splitting light or causing dispersion of light beams. A prism is a multi-faced solid made of transparent materials (such as glass, crystal, etc.). It is widely used in optical instruments. Prisms can be classified into several types based on their properties and uses. For example, in spectroscopic instruments, the "dispersive prism" that decomposes composite light into spectra is commonly used; the more commonly used one is the equilateral prism; in periscopes, binocular telescopes, and other instruments, it is used to change the direction of light and adjust the imaging position, which is called a "total reflection prism", and generally a right-angle prism is adopted.

Our high-precision optical triangular prisms are transparent polyhedral components made of premium optical materials (such as BK7 glass, fused silica, crystal, etc.), featuring flat, polished surfaces that intersect at non-parallel angles. Designed to refract, disperse, or redirect light beams, they are core components for a wide range of optical systems. As a professional custom manufacturer, we offer various types of triangular prisms, with equilateral prisms as our best-selling category, widely used in spectroscopy, microscopy, education, laser systems, and imaging equipment. Our prisms deliver stable optical performance, precise light control, and durable quality, meeting the needs of both industrial and scientific applications.

Working Principle 

The core principle of optical triangular prisms relies on light refraction and dispersion – when light passes through the transparent prism, it bends (refracts) at different angles due to the difference in refractive index between air and the prism material.
• Step 1: Light enters the first polished surface of the prism at a certain angle.
• Step 2: The light bends toward the prism's base as it enters the prism (refraction occurs).
• Step 3: The light bends again when exiting the second surface, finally deviating from its original path.
• Key Phenomenon: White light (composite light) will be split into a spectrum of seven colors (red, orange, yellow, green, blue, indigo, violet) after passing through the prism, which is the most typical dispersion effect.

Main Product Types

Equilateral Triangular Prism 

Right-Angle Triangular Prism

Isosceles Triangular Prism 

Our most popular type, with three equal sides and three 60° apex angles. It is mainly used for light dispersion, splitting white light into spectral colors, and is widely applied in spectroscopy, education demonstrations, and wavelength separation tasks. It offers high transmittance, precise angle control, and stable dispersion performance.

With a right angle (90°) and two 45° angles, it is mainly used to change the direction of light (e.g., 90° deflection) and adjust imaging position, suitable for periscopes, binoculars, and laser systems.

With two equal sides and equal base angles, it is suitable for light reflection, beam deviation, and optical path adjustment in precision optical instruments.

Specification

PRODUCT NAME	Equilateral Prism
PRODUCT SIZE	1-500mm
SURFACE PERFECTION	20/10 or better
DIMENSIONAL TOLERANCE	±0.02MM
MATERIAL	Glass
TRANSMITTANCE	96%

Optical Applications‌

Prism, a polyhedron made of transparent material is an important optical component. The plane where light enters and exits is called the side plane, and the plane perpendicular to the side plane is called the principal section plane. According to the shape of the principal section plane, it can be divided into prisms, right-angle prisms, pentagonal prisms, etc. The principal section plane of a prism is a triangle, and there are two refractive surfaces. The angle between them is called the apex angle, and the plane opposite to the apex angle is the base plane. According to the refraction law, light passing through a prism will be deflected twice towards the base plane, and the angle between the outgoing light and the incoming light is called the deflection angle. Its size is determined by the refractive index n of the prism medium and the incident angle i. When i is fixed, different wavelengths of light have different deflection angles. Among visible light, the deflection angle is the largest for violet light and the smallest for red light. In modern life, prisms are widely used in digital devices, science and technology, medical instruments, etc. Common digital devices: cameras, closed-circuit television, projectors, digital cameras, digital video recorders, CCD lenses, and various optical devices; science and technology: telescopes, microscopes, level meters, fingerprint scanners, gun sights, solar converters, and various measuring instruments; medical instruments: cystoscopes, gastroscopes, and various laser treatment equipment.

Company Profile

FUSHI

Tianjin Fushi Optics Co., Ltd. is a comprehensive optoelectronic enterprise integrating R&D, production, sales, and after-sales service. Since its establishment in 2012, the company has been dedicated to technological innovation and industrial application in the field of optical components, with its manufacturing base located in China's core optical industry zone. The product portfolio covers a full range of optical basic components, including lenses, prisms, mirrors, optical windows, and filters, with particular technical expertise in the design and manufacturing of diffraction gratings.  
In 2017, Fushi Optics established a professional optical laboratory in Dongli District, Tianjin, committed to integrating optical theoretical research with engineering practice. After years of technical accumulation, the laboratory has gained wide academic recognition for its research achievements in spectral analysis, precision optical processing, and other fields, forming an integrated "industry-academia-research-application" technological innovation system. It continues to provide high-performance optical solutions for the optoelectronic industry.

Packing & Delivery

We attach great importance to every detail in production and communication. Should you have any questions, suggestions, or comments, please do not hesitate to share them with us. Your feedback is invaluable in our pursuit to become a worthy, trusted, and reliable supplier. Thank you for your visit.

FAQ

Q: How can I get samples from you?
A: Just send us your requirements, and we will send samples accordingly. 
 
Q: How long is your delivery time? · 
A: Regarding inventory, it is 3 working days;For customized one, it's about 15-25 working days, depending on exact quantity and order date. 
 
Q: Can I customize the products based on my requirements?
A: Yes, we can customize the material, specifications and optical coating for your optical components as per your requirements.

Q: Are you a factory? 
A: Yes, we are a professional manufacturer of optical components. We have more than 20 years of experience in optical cold working.
 
Q: How do you control the quality?
A: More than four times of quality inspection during the production process; we can provide the Quality Test Report.