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01-23-2010, SCHOTT Advanced Optics
SCHOTT Now Offers Glass Rods Up To 1 Meter Long
Fire-polished glass rods, only millimeters in thickness and up to 1000mm long, now available for efficient manufacturing of small lenses.
As video cameras, mini projectors, digital and cell phone cameras become smaller and ever more precise, there is increased demand for high-quality lenses. There is also a rising demand for spherical lenses, aspheres and discs with diameters of less than one millimeter in fields like endoscopy, microscopy and telecommunications.
In addition, the Research & Development department at SCHOTT is working to provide conical rods, prisms, tubes and right angle designs, as well as standardized round rods.
Efficient manufacturing of small optical components
The products currently offered include rods made of optical glasses, like LASF35, which has an extremely high index of refraction (nd = 2.02204; vd = 29.06) as well as low Tg glasses such as P-LSF47, which is well suited for the precision molding process. Other glasses types are available upon request.
The length of the rods enables considerably higher yields, while the smaller diameter results in less material loss during manufacturing of smaller components. The fire-polished surface of the rods is already sufficient for a variety of applications, and the new dimensions of the rods ensure easier processing and a noticeable reduction in processing time.
Expansion of the low Tg glass product line
Besides the new shapes, SCHOTT has also expanded its product range of low Tg glasses—those with low transformation temperature (Tg<550°C)—which enable mass production of extremely small optical components in an efficient manner.
In addition to the P and N glasses, the following glass types now successfully qualify for use in precision molding: N-KZFS2, N-KZFS4, N-KZFS5, N-KZFS8, N-LAF33, N-LASF46B and SF57. The glass type N-LASF46A has also been further developed. Effective immediately, the N-LASF46B type (nd = 1.90366; vd = 31.32) is available with considerably improved transmission in the blue spectral range.
“True Color”: Low Tg glasses for the field of life sciences
The glass types N-KZFS4, N-KZFS5 and N-KZFS8 belong to the special short flint glasses that SCHOTT offers that are mainly characterized by a profound deviation of the partial dispertion from the normal line. They feature particularly high transmission within the blue-violet spectral range combined with a remarkable low fluorescence at an excitation wavelength of 365 nm.
SCHOTT “True Color” glasses are being used more and more frequently in the fluorescence microscopy because they are ideally suited for realizing correction apochromatic designs.
More press photographs are available for downloading under: www.schott-pictures.net
Long rods made of optical glass: With diameters of < 1 mm and lengths of up to 1000 mm, the long rods made of specialized optical glasses from SCHOTT (low Tg glasses, LASF35, etc.) that feature a fire-polished surface are used for manufacturing miniaturized optical components.
Precision molded aspheres: SCHOTT low Tg glasses for precision molding allow for efficient manufacturing of even the smallest optical components, such as aspheres.
Spherical lenses are used for coupling or collimation of optical light in the writing and reading heads of DVD/DVR appliances, in micro technology or in fiber optics. With diameters of 0.040 to 10 mm, SCHOTT manufactures spherical lenses from various optical glasses and enables coupling efficiencies of 75%. Depending on the application, optical glasses, such as N-BK7, but also extremely high refractive glasses, like LASF35, which has a unique refractive index of nd = 2.02, are used