Category: Technical

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In our efforts to make this Technical Reference as complete as possible, we encourage you to send us additional technical reference information that you may have gathered in researching material data. Current Technical Information Includes: Optical Transmission Properties transmission curves and brief descriptions of Corning Code 7740, Fused Silica, BK 7 Glass and others. Tables of Glass Physical Properties of Corning Code 7740, Quartz (GE 124), and Mullite. %CODE3% Glass Tube Pressure Calculator Calculate the “Maximum Allowable Pressure” for a glass tube of given outside diameter and wall thickness (both with same unit). This is based on the Barlow’s formula, assuming the tensile strength of glass is 4000 psi and a safety factor of 4.                 Note: flaw or imperfection of the glass tube can substantially reduce the maximum allowable pressure below the calculated value.

  Pyrex® – Corning Code 7740     Fused Silica UV Grade Fused Silica is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a very low thermal expansion coefficient with good optical qualities, and excellent transmittance in the ultraviolet region down to 195 nm. Transmission and homogeneity exceed those of crystalline quartz without the problems of orientation and temperature instability inherent in the crystalline form. Fused silica is ideally used with high-energy lasers due to its high energy damage threshold. UV fused silica also has excellent transmission in the visible and infrared region up to approximately 2.1 µm, and a low content of inclusions with high refractive index homogeneity. Fused silica is used for both transmissive and reflective optics, especially where high laser damage threshold is required.     BK 7 Glass BK 7 is one of the most common borosilicate crown glasses used for visible and near infrared optics. Its high homogeneity, low bubble and inclusion content, and straightforward manufacturability make it a good choice for transmissive optics. BK7 is also relatively hard and shows good scratch resistance. The transmission range for BK 7 is 380–2100 nm. It is not recommended for temperature sensitive applications, such as precision mirrors.     Multi-Transmission – SF 8, SF10, Pyrex®     Multi-Transmission UV Grade Fused Silica, IR grade Fused Silica, Optical Crown Glass, Optical Grade Fused Silica     Multi-Transmission Fused Silica, Zinc Selenide, Germanium, Calcium Fluoride, AMTIR 1   Multi-Transmission Sodium Chloride, Zinc Sulfide, Magnesium Fluoride, Sapphire     Reflectance SP 8, SP 10, Pyrex®   Please use the email form below to submit technical information that you feel would be helpful to your colleagues as a technical reference. [contact-form-7 id=”753″ title=”Technical Information”]