The colourless optical glass covers more than 200 types which including environmentally-friendly colourless optical glass, low softening point optical glass, non-eco optical glass and radiation resistant glass, etc.
Colourless optical glass is widely used in consumer electronics such as camera, mobile phone, projector, CCTV camera. It is also widely used in astronomy, biology, medicine and aerospace, etc.
CDGM colourless optical glass is available in the form of glass blanks, pressed blanks, cut blanks，optical preforms as well as optical components.
The specifications are shown in the following table:
Glass blanks | |
Supply forms: | Strips，blocks |
Dimensions: | Strips：360mm×（80～160）mm×（8～60mm） Blocks：upon request of customers |
Pressed blanks | |
Lens: | OD(outer diameter): Ф7mm～Ф350mm CT(center thickness): 1.1mm～50mm |
Rods: | OD(outer diameter): Ф3.2mm～Ф10mm Length：150mm |
Pressed plates: | Length：40mm～80mm Thickness: 4mm～10mm |
Special-shaped products: | Side length or diameter: 5mm～180mm upon request of customers |
Cut blanks | |
Round plates: | OD(outer diameter): Ф2.5mm～Ф150mm CT (center thickness): 0.5mm～50mm |
Cut prisms： | Min edge length：5mm Max edge length：150mm |
Optical preforms | |
Dimensions: | Lens: OD(outer diameter): Ф2mm～Ф35mm CT (center thickness): 0.4mm～25mm Precision gob： Shape：biconvex oval Volume：(100～650)mm3 Weight：(300～1830)mg Weight tolerance：±(5～25)mg |
Optical components | |
Supply forms: | Spherical lens, aspherical lens, customized special-shaped products |
Notes：The supply forms and dimensions depend on glass type. Please contact us.
The allowable tolerance of nd and νd is generally controlled within：
nd：±30×10-5
vd：±0.5%
As requested, the allowable tolerance of nd and νd could be controlled in ±20×10-5 and ±0.3% respectively. For fine anneal glass types of H-K9L、H-K9LGT、H-BaK7、H-BaK7GT, the tolerance of nd and νd could be controlled in ±10×10-5 and ±0.2%. Please contact us for other specifications.
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