Optical Glass
Low Softening Point Optical Glass
Low Softening Point Optical Glass

  Low softening point optical glass is a kind of environment-friendly optical glass with low softening point. The softening temperature is below 600℃, it can reduce the forming time and prolong the mould life due to the low temperature in glass forming, especially suitable for precision molding.

  We provide more than 20 low softening point optical glass products; they are the ideal material for aspherical preform or aspherical optical component.


  We supply strips, optical preforms and optical components, etc. 

  The specifications are shown in the following table:

Glass blanks

Supply forms:

Strips

Dimensions:

360mm×(80~160mm×(8~60mm

Optical preforms

Supply forms:

Lens, precision gob

Dimensions:

Lens: OD(outer diameter):Ф2mm~Ф35mm

 CT (center thickness):0.4mm~25mm

Precision gob

 Shapebiconvex oval

Volume:(100~650mm3

Weight:(300~1830mg

Weight tolerance±525mg

Optical components

Supply forms:

Upon request of customers

  Notes:The supply forms and dimensions depend on glass type. Please contact us.

  Normally the reference annealing rate for low softening point optical glass is 4℃/h. Unless specifically requested, CDGM low softening point optical glass will be delivered in refractive index/Abbe number with a standard test report. 

  Because of the high cooling rate of precision molding process, actual product nd is less than the sample nd on the product certification (annealing rate:4℃/h). The actual value of nd depends on glass type, precision molding process and geometric shape of products.

  We can properly adjust the nd upon request of customers.

  Reference annealing rate for low softening point optical glass is 4℃/h , the allowable tolerance of nd and νd are as follows:      

          nd:±50×10-5 

          vd:±0.5%


Product pictures