Ohara Optical (M) Sdn Bhd

Ohara Quartz successfully developed synthetic fused silica SK-1300 as a result of significant improvements made to the conventional VAD (vapor-phase axial deposition) method of optical fiber manufacturing technology.

Unparalleled,ideal characteristics are achieved.

• Ultra-high purity(total metallic impurities less than 0.5ppm)
• The OH content can be controlled to 1ppm to less.
• High heat resistance is ensured.
• High transmission is achieved.(The SK-1310 has excellent characteristics over the entire wavelength range of ultraviolet,visible and infrared.)
• Contain no bubbles or striae.
• Excellent laser resistance properties.
• The material for excelling in the homogeneity and precise optics is prepared.(SK-1320 series)
• Application
• For VLSI manufacturing process
• Furnace tubes
• various industrial jigs for semiconductors
• Sputtering targets
• Photomask substrates for ultra-LSI and LCD.
• Wafers for various types of devices such as TFT(poly-Si thin-film transistor LCD.), SOI (Silicon on Insulator) etc.
• Optical elements, Lenses, mirrors and windows, for ultraviolet and vacuum ultraviolet.
• materials for optical fiber

Standard size

• Tubes&Rods
  Outer diameters of large size tubes 100~450mm
  Outer diameters 5~100mm
• Rods
  Outer diameters 3~200mm
• Plates
  50~500mm round,50~1000mm sq.

Quartz tube and rod

OHARA QUARTZ silica glass tubing and rod products range from synthetic fused silica for processing operations of ultra LSIs to fused silica for various types of jigs and tools.

OHARA QUARTZ synthetic fused silica,which offers an ultra-purity of tubing and rod without any bubbles contained.

Fused quartz uses a high-purity crystal thus providing both hydrous products that contain fewer bubbles and anhydrous products with a high heat resistance.

Synthetic Quartz Wafer

The synthetic quartz substrate of the OHARA QUARTZ Co., Ltd. is a product that combines the characteristic with an excellent VAD method synthesis fused silica SK-1300, the precise processing of polishing technique is invented, and has the following kinds.

1.Photmasku substrate for ULSI &LCD
2.TFT Substrates
3.each sizes of quartz wafer

CLEARCERAM™ shows almost Zero Thermal Expansion over a wide temperature range and offers superior thermal shock resistance. CLEARCERAM™-Z Regular offers lower thermal expansion across a wide temperature range, while the CLEARCERAM™-HS offers lower thermal expansion near room temperature. CLEARCERAM™-Z EX features extremely low temperature dependence of thermal expansion in 0 to 50degree C, which is less than half of the present high spec grade (CLEARCERAM™-Z HS)

CLEARCERAM™ has very high chemical durability and is very stable in various cleaning and thin-film coating processes. CLEARCERAM™-Z does not contain Na, K, B, F, or Pb in its composition which is a main reason for the excellent chemical resistance the material displays.

The crystal grain structure of the material prevents the propagation of micro crack caused in machining process. This property allows the material to be processed into various shapes with high accuracy, with ease of machinabilty and elevated yield rates.

The material has very high chemical durability and is very stable in various cleaning and thin-film coating processes. CLEARCERAM™-Z does not contain Na, K, B, F, and Pb in its composition which is a main reason for excellent chemical resistance the material displays.

By these characteristics, CLEARCERAM™ is used as a mirror material for semiconductor exposure equipment and highpowered telescopes requiring a high degree of precision.

The optical parts of optical devices are composed of combinations of optical components, including spherical lenses,aspherical glass mold lenses, prisms and filters, which are made with multiple types of optical glass with characteristics in its refractive index and/or its transmittance. In order to attain optical designs for various optical devices, OHARA deals with over 150 types of optical glasses and meets the needs of a wide variety of optical designs for optical devices to enable
higher performances, miniaturization, weight reduction and cost reduction. In addition, depending on requests from our customers, we supply lens blanks in a suitable shape to be processed, finished lenses and so on. OHARA provides customers with optical glass products in a wide variety of types, from glass materials to optical components.

135 different types of optical glass for use in polished lenses and optical elements. For the purpose of global environmental conservation, OHARA uses no lead or arsenic in these 135 glasses. 

Ohara also offers 18 types of Optical Glass for Molded Aspherical Lenses(Low Tg Optical Glass) for use in molded lenses. The glass type designation for these types begins with L-. They are also environmentally friendly, as they do not contain lead or arsenic.

Non-browning Glass

A special optical glass that reduces coloring in a radiation environment. It is used for optical components in radiation environments such as outer space. 

A standard optical glass be colored under radiation environment and light cannot pass it through. When the camera lens colored, the correct image cannot be obtained and the function as a camera will be lost. 

Reduce coloring by irradiation: Even if it is placed in a strong radiation environment where general optical glass is colored, its transmittance almost no changes before and after irradiation due to its special composition. 

Larger diameter : Some Non-browning Glass are possible to yield 150mm diameter or larger by manufacturing technology that Ohara has cultivated for many years. Please consult us for details. 

Available in small lot orders : We can handle orders for several pieces per lot as we have been doing to general optical glass. Since it can be processed in the same way as general optical glass, it can be hot pressed, ground and polished.

Product Types

Reheat Pressings: Products molded in heat press to shapes suitable for spherical polished lenses and prisms

Spherical Lenses : Fini shed lenses produced by polishing, centering and coating

Polished Preforms : Spherically polished product in a suitable shape to be processed into aspherical glass mold lenses

Aspherical Glass Mold Lenses : Products fabricated by heating and softening polished preforms and transferring it in an ultra-high accuracy aspheric mold and then supplied after centering and coating

>Development of a 55 mm-Diameter Large-Aperture Aspherical Glass Mold Lens

A “large-aperture concave meniscus lens*” is one product that meets the diverse needs of our customers, used mainly as a camera or projector lens for its ability to capture and significantly refract large amounts of light. Manufacturing a “large-aperture concave meniscus lens” using the glass molding technique is technically challenging, but we have continued to work on developing this technology and have finally succeeded in producing a large-aperture concave meniscus lens with a diameter of 55 mm and an inclination angle of 45 degrees. We will continue to work on technological developments to meet the diverse needs of our customers.

Glass-ceramic which we have furt h e r improved OHARA’s nanocrystallization technology, achieving both superior shock resistance and high transmittance. This product is used in covers for automotive sensors and cover glass for smartphones where high strength is required. 

“NANOCERAM™” has been selected for use in the “KITSUNE” microsatellite. This microsatellite is manufactured by a consortium (the “HAK Consortium”) consisting of Harada Seiki Kogyo Inc. (Hamamatsu-shi, Shizuoka), Addnics Corp. (Hachioji-shi, Tokyo), and Kyushu Institute of Technology (Kitakyushu-shi, Fukuoka).

Impact Resistance High Hardness : Compared with general borosilicate glass, NANOCERAM™ has 30% higher hardness and showed more than 10 times higher impact resistance in steel ball drop impact test. In addition, it has a 20% higher hardness than chemically strengthened glass, and showed more than 3 times higher impact resistance in steel ball drop impact test. Also, it has better fracture toughness than sapphire crystal glass, and cracks that cause breakage do not occur even if there are scratches and realizing a characteristic that is resistant to cracking.

 Good Processability : Although it has the properties of hard ceramics, the cutting, polishing and moldability realized workability comparable to that of glass. Moreover, it has grinding and polishing property which can shorten process time to about 1 / 20th of sapphire crystal glass. 

High Transmittance : Since, crystal grains of glass ceramics are large, so it is difficult to transmit light and never used for optical applications. However, high transparency has been realized by Ohara's nanocrystallization technology (particle diameter about 6 nm) which has a high track record in the space and astronomy fields. NANOCERAM™ is mounted on a high-end lens protector for single-lens reflex interchangeable lenses of domestic manufacturers who are demanding strict optical performance and precise quality, and NANOCERAM™ has received high marks.

These materials are optically homogeneous and have excellent internal transmittance and high durability against solarization (coloring by UV). They are used in semi-conductor production equipment (Stepper Cameras) and its peripherals (Illumination Systems, etc.).

Internal transmittance of the glass is indicated as guaranteed minimum transmittance at 365nm (10 and 25 mm sample thickness). Please note this is internal transmittance, reflection losses are not included.

The degree of solarization is indicated as a decrease in transmittance caused by radiation from a super high pressure mercury-vapor lamp. The detailed measurement method is described in the "Japanese Optical Glass Industrial Standard (JOGIS)".

Optical Homogeneity (Δn) is guaranteed by use of our He-Ne laser interferometers. The Δn specification is indicated for three diameter ranges (Φ 160 mm or less, Φ 210 mm or less, Φ 260 mm or less) due to the Δn variances caused by glass type, size, and shape. Please note, if the ordered thickness is less than 25 mm, we will use a 25 mm thick test piece for Δn measurement. Please contact us when lower Δn specifications are required.

Refractive Index (ni) Variation within one Lot (Sn Standard): The indicated Sn value is the refractive index variation after annealing within a single batch (same melt, same annealing run). Example: ±1 (×10⁻⁵)

The standard refractive index (ni) of our i-line glasses is higher than our catalogue nominal values. This is due to the longer annealing times which are necessary to obtain the desired homogeneity levels. Longer annealing times result in higher refractive indices. Example: +20±20