Ohara Microcrystalline Glass/Ohara Optical Substrate/Ohara Fused Silica
Raytek offers OHARA Microcrystalline glass and Schott Microcrystalline glass widely used in optical system. This material was developed by OHARA based on our knowledge of High Homogeneity melting and Precise Crystallization. This material is produced under tightly controlled conditions and offers outstanding thermal, mechanical and chemical properties. Glass Ceramics has a very low thermal expansion rate, so it is essential for a large number of demanding high-tech applications that require extremely high accuracy.
Applications
•Semiconductor components
•Liquid crystal module
•Optical plane, optical substrate, optical window, interferometer assembly;
•Laser refracting mirrors and reflecting mirrors
•Astronomical telescope mirrors, block gauges, long precision scales, optical base platforms and precision equipment bases
•Planes and mirrors for IC and LCD lithography equipment
•Laser reflector
•Lightweight optical mirror blank
•Vacuum suction cup
•ultra-precision machine tool rail
•Technical standard for precision measurement
Main Characteristics
Extraordinary features
1) The zero expansion glass ceramics have special properties. When the temperature changes, the change of geometry and distance is almost zero.
2) Very low coefficient of thermal expansion (CTE), suitable for a wide range of temperatures
3) Excellent CTE uniformity throughout the material
4) The degree of defect is very low
5) A variety of accurate geometric shapes can be obtained by grinding process
6) When the residual roughness is less than 1 nm, the surface may be very smooth
7) Excellent chemical stability
8) All of these features enable extraordinary reproducibility for small components and for large ton telescopes used in astronomy.
Matching Custom Manufacturing Service
Including Moulding, CNC machining, Polishing, Particle beam processing, Magnetic flux conversion processing, Grinding, Coating, Light-weight, Custom Shaping, Counterbores, Drilling & Coring, Edge & Bevel Polishing,3D Contouring, Bevels & Chamfers, Steps & Slots, Laser Cutting & Marking, Metrology & Inspection, Precision Pitch Polishing, Double-Sided Polishing, Optical Assembly, Measuring, etc.
Matching processing equipments;
1).Single side lapping and polishing machines
2).Double sided polishing machines
3).Ring throwing machines
4).DMG five-axis five-linkage spherical milling machine
5).DMG ultrasonic machining center
6).Super large scale gantry CNC machining center (2.0*2.0m)
7).Super large scale surface grinder (1.6m*1.6m)
8).CNC cutting machines
9).Thin plate cleaning machines
10).Ultrasonic trough cleaning machines
11).Plane interferometers
12).Two dimensional detectors
13).Ion beam polishing machines
14).Magnetorheological polishing equipments
Product Parameters
|
CLEARCERAM-Z |
Standard |
HS-Level |
Thermal properties |
Thermal Expansion Properties(*/ºC)0~50ºC |
0.0±1.0 |
0.0±0.2 |
|
Thermal conductivity(W/m.k) |
1.51 |
1.52 |
Mechanical property |
Young's modulus(GPa) |
90 |
90 |
|
Stiffness(GPa) |
36 |
36 |
|
Poisson's ratio |
0.25 |
0.25 |
|
Knoop hardness H |
600(6) |
640(6) |
|
Vickers hardness HV |
680 |
700 |
|
Abrasion degree A |
62 |
64 |
|
Flexural strength (Mpa) |
116 |
111 |
|
Specific gravity |
2.55 |
2.55 |
Optical property
|
Refractive index |
1.546 |
1.547 |
|
Refractive index(1550) |
1.528 |
1.528 |
|
abbe number |
55.5 |
55.0 |
|
Internal transmittance (%) (10mmt) |
500nm |
>85 |
>80 |
|
|
980nm |
>98 |
>97 |
|
|
1550nm |
>98 |
>98 |
Chemical properties |
Water resistance (powder) |
Class2 |
Class1 |
|
Acid resistance(powder)RA |
Class1 |
Class1 |
|
Alkali resistance(powder) |
0.25% |
0.21% |
Chemical properties |
Resistivity(Ω/cm)25ºC |
1.5* |
6.4× |
Product Description
Company Profile
Shanghai Ruitai Photoelectric Technology Co., Ltd. was established in April 2016 and is headquartered in Shanghai, China. The company specializes in the research, development, production, processing, and service of optical technology and materials. Its business scope encompasses the manufacturing, processing, and customization of a wide range of optical materials and products, including quartz glass, microcrystalline glass, low-expansion glass, silicon carbide, calcium carbide, barium fluoride, zinc sulfide, and zinc selenide. Annually, the company delivers over one million optical rough parts, covering a comprehensive range of applications in optical design, OEM customization, aerospace, laser technology, photolithography, optical imaging, medical microscopy, biotechnology, semiconductors, optical communication, electronic components, and precision engineering.
Adhering to the principle of "Quality First, Customer Supreme," Shanghai Ruitai Photoelectric Technology Co., Ltd. implements a quality management philosophy centered on meticulous manufacturing, scientific management, customer satisfaction, and people-oriented practices. The company is deeply engaged in the field of new optical materials and technologies, continuously innovating and striving to become one of the leading enterprises in China's optical technology industry with large-scale production, supply, and processing capabilities for optical materials. In addition to providing basic optical materials such as quartz, microcrystalline materials, optical glass, and infrared materials, the company also manufactures and sells various optical components...
Equipped with a professional production base spanning 10,000 square meters, the company utilizes advanced processing equipment, including large waterjet cutters, horizontal band saws...
The company's products are widely sold in Europe (e.g., Germany, Spain, Italy), the United States, Russia, Japan, South Korea...
Additionally, Shanghai Ruitai Photoelectric Technology offers a variety of optical materials from renowned brands... The company has established extensive and deep business relationships with major domestic optical, mechanical, and electrical institutes, research institutes, and astronomical institutions at all levels.
Packaging & Shipping

Certifications
Our Advantages
FAQ
What products does Shanghai Rui Tai Photoelectric Ltd. mainly produce and sell?
- The company specializes in the production and sale of a wide range of optical components, including lenses, mirrors, window plates, diffusers, filters, polarizing optical components, beam splitters, prisms, diffraction gratings, infrared optical components, optical fiber assemblies, laser optical components, coated optical components, ultrafast optical components, and over-limit optical mirrors.
- Additionally, the company offers high-end optical substrates from several renowned international brands, such as CORNING, SCHOTT, OHARA, NIKON, AGC, LEONI, VITRON, and C-LASER. These substrates include quartz and microcrystalline materials like Corning 7980, Corning 7979, Corning 7972, Corning 7973, Schott ULE, ZERODUR, OHARA CCZ, OHARA SK1300, and C-LASER CFS-100, which are highly sought after in the market.
What services can Shanghai Rui Tai Photoelectric Technology Co., Ltd. provide?
- We offer one-stop services including design, processing (cutting, forming, drilling, core-taking, chamfering, beveling, CNC, grinding, polishing, coating, cleaning, blackening, assembly, inspection, etc.) and customization of various optical materials and components.
- Provide various optical equipment: such as milling machines, grinding machines, and inspection equipment; At the same time, we can provide customized software design, on-site installation, supply of consumable parts, training and other services for these products
How long is the delivery time?
- For customized materials and machine tools, the delivery period is generally 7 days to 8 weeks, with extensions made during holidays. The specific delivery period is subject to the assessment in the quotation file.
Which international logistics and express delivery services can be chosen?
FedEx,DHL etc.