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Optifab |
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 It was held from May 15(Tue) to May 17(Thu), 2007 in Rochester/New York, 1,851 Attendees and 175 Exhibitors. Reputations among exhibitors were favorable., since all visitors and exhibitors are interested in optical glass materials, process of production. Optifab is held every two (2) years, so the next one is expected in 2009.
 There were many exhibitors from abroad, though their majority was local manufacturers/suppliers. We, SUMITA OPTICAL GLASS, INC., participated in this Optifab for the first time, introducing glass materials for precision molding, aspheric lenses and LUMILASS(fluorescent glass). Especially, K-PSFn214, recent developed/industrialized high index material, came under the spotlight, showing the difference of thickness with the same focal length in conventional optical glass, K-BK7. And, beautiful full-cut K-PSFn214 was also exhibited, with which visitors were impressed.
 FREE SHAPED LENS, such as micro-lens array, aspheric surface cylindrical lens and so on, were also introduced. These are various shapes which were produced in plastics before and now available in optical glass thanks to our materials/molding technology. Many visitors were interested in our materials/technology and the curtain of Optifab came down.
>>FREE SHAPED LENS(PDF)
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World First Dream Light Source |
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-Succeeded in white laser oscillation with a single fluoride glass fiber-
First time in the world, Sumita Optical Glass, Inc. (Address: 4-7-25 Harigaya, Urawa-ku, Saitama, 330-8565 Japan, President: Mr. Masatoshi Sumita, Phone No. 81-48-832-3165) has succeeded in continuous white laser oscillation with a newly developed single fluoride glass fiber by combining the three primary colors, namely 522nm green, 635nm red lasers, oscillated simultaneously by guiding 440nm blue diode laser into a single fluoride glass fiber, and a part of 440nm blue diode laser out put.
To date, white laser has been created by combining the three primary colors generated separately by guiding IR laser into nonlinear crystal like YAG laser, ti-sapphire laser and etc., or gas laser, however those methods suffer problems like conversion inefficiency which enlarges energy consumption, needs large size laser oscillator and extremely high cost.
Since white laser of this new development is configured with a single fluoride glass fiber and 440nm blue LD only, it is an outstanding product in terms of conversion efficiency, energy consumption, a compact size laser oscillator, cost performance and etc.
This uniquely developed fluoride glass fiber used for white laser oscillation is a practicable one. It is made of a series of aluminum fluoride glass doped with praseodymium, which emits green and red fluorescence by absorbing blue diode laser. The distance between resonators at both ends of the fluoride glass fiber is 25cm in this time.
Some fluoride glass fibers for researches are available in the market, but almost all of them are made of a series of zircon-fluoride glasses, which are unendurable to practical use.
As the wavelength of green laser obtained with this white laser is of 522nm which is that of pure green, by using this white laser as a light source of display, such a display would have closer colors to natural colors than those of traditional CRT display, plasma display, projectors with ultrahigh pressure mercury lamp, LCD and etc., it becomes possible to create a display with high-luminance, low-power-consumption, compact and low cost performance.
In anticipation of new appliances development, making use of this new development of white laser in the future, Sumita Optical Glass, Inc. is committed to pursuit improvement of the performance of this fiber in terms of out put and conversion efficiency as well as development of souped-up blue LD to be guided into the fluoride glass fiber.
Reference (PDF) |
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MICRO-LENS ARRAYS IN OPTICAL GLASS |
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In the current information and communication society, prospecting increasing information volume, more and more the magnitude of the optical networking is increasing,. Under this circumstance, a micro-lens array is attention-getting as a parallel optical device which can be iilluviated data in two dimension for a huge process communications.
High homogenization and high accuracy of alignment is required for micro-lens arrays, however,
it was difficult to have both complex shape and high accuracy all at once in optical glass products.
We, SUMITA OPTICAL GLASS, INC., have succeeded in producing a very complex micro-lens array using optical glass. This lens array has 1 row x 12 lenses which each lens diameter is 240 µm, SAG value 25 µm, pitch distance 250 µm.
As general precision molding temperature of conventional optical glasses is 500-600 ºC , refractory materials, such as Tungsten Carbide, Ceramics and so on have to be used , which have negative factors such as limited workability, so the shape and specs were bounded. Our K-PG325, Super Vidron, is moldable at a temperature of around 325 degrees Centigrade, which is the lowest molding temperature among precision molding optical glass materials. This K-PG325 makes it possible to use common materials for molds, which offer superior workability for making a die with complex shapes at low cost.
We produced a collimate lens this time, F number 2.5, NA 0.2, aspheric shape which paraxial radius is 296 µm. After measuring, we found that accuracy of pitch distance and SAG value is high precise, both within ±0.1micron.
Succeeding in producing a micro-lens array using optical glass makes place more expectations on mass production of at low price and applications in tough circumstances which plastic products can not be allowed to use. |
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Now under a new company name in Nuernberg/Germany! |
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We are pleased to inform you that since September 2005 our new company name is Sumita Optical Glass Europe GmbH.
Address :
Neumeyerstr. 48
90411 Nürnberg
Germany
Tel.: +49-(0)911-2526-160
Fax: +49-(0)911-2526-163
Email : europe@sumita-opt.co.jp
We are looking forward to receiving your estimated input and requests with anticipation. |
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Website Renewal |
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On April 1, 2003, Sumita Optical Glass's website was
renewed, adding the latest product information & data. |
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New Address |
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As Saitama City gained the
ordinance-designated city status on April 1, 2003, our address
changed as follows:
Sumita Optical Glass, Inc.
4-7-25, Harigaya, Urawa-ku, Saitama City Saitama 330-8565, Japan
Tel: +81-48-832-3165
Fax: +81-48-824-0734 |
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UV Fiber/UVF-40 |
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We introduce UVF-40, a multicomponent glass fiber.
* Less Solarization
* Lower-cost alternative to Quartz Fiber
* Higher NA 0.35 (Opening Angle 40°) |
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Winner of Excellence Award 2003/Photonics Spectra |
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This year's 25 winning products were chosen
from among the hundreds of entries submitted from around the world.
Our K-PG325/Super Vidron was chosen as one of the most technically
innovative new products of the year.
The ceremony took place on January 27 in San Jose, California, at the Fairmont
Hotel, concurrently with Photonics West. |
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