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Optical Glass Block - China

price: contact company for price

1) Optical Glass Type and Symbol

Type Symbol Type Symbol

Fluorin Crown FK Crown Flint KF

Light Crown QK Light Flint QF

Crown K Flint F

Barium Crown BaK Barium Flint BaF

Dense Crown ZK Dense Barium Flint ZBaF

Lanthanum Crown LaK Dense Flint ZF

Lanthanum Flint LaF

Dense Flint ZLaF

Special Flint TF2) Designation:

1. Ordinary glass designation:

Each optical glass type is designed by an abbreviated symbol and a number. In additional to our glass type designation, a six digital code is list in the catalogue. The first three- digitals indicate the three numbers after the decimal point of glass refractive index and the last three digitals indicate the Abbe- number, for example H- K9L nd=1.51680, vd=64.2, its code comes to be 517642.

2. Environmental glass designation:

The optical glass without Lead, Arsenic and Cadmium and other radioactive elements is expressed by a prefix ‘H- ’ indicating. It is environment- friendly characteristics, for example H- K9L.

3. Low softening point glass designation:

Low softening point glass type without Lead, Arsenic and Cadmium and other radioactive elements is prefixed by an alphabet ‘D- ’ indicating, for example D- K9L.

4. UV high transmittance glass designation:

UV high transmittance glass is prefixed by an alphabet ‘U’ as usual, which means ultraviolet, for example UQF50. High transmittance glass is expressed by a suffix ‘- HT’ indicating high transmittance, for example ZF7LHT.

3) Supply forms:

1. Blocks:

The two larger surfaces are fine ground while the other surfaces coarse ground. All the edges and angles are chamfered and the blocks are fine annealed.

2. Blank:

2.1 Direct- press blank: It is directed formed from melted glass, not fine annealed.

2.2 Reheated- press blank: It is formed by reheated- press process, and is fine annealed.


Company Contact:


  • Phone: 862584620580

  • Address: No.37 Long Pan Road , Nanjing, China

  • Email: Email


Published date: February 14, 2016 -

  • Business Description: FULAN has been specializing in the supply of precision optics machine,

    ophthalmic lens machine, optical equipment and optical instrument etc.

    A. Precision Optics(Optical) Machine and Consumable.

    1) Glass sawing machine,Cylindrical grinding machine,Centerless grinder.

    2) Spherical(curve)/Plano generator,Optical/Mechanical centering machine.

    3) High speed spherical/plano grinding & polishing machine.

    4) Slow speed spherical/plano grinding & polishing machine.

    5) Diamont sheet,Diamond wheel,Diamond pellet,Polyarethane polishing pad,Polishing powder.

    B. Ophthalmic Machine and Consumable.

    1) Alloy blocker,Alloy deblocker,Center thickness gauge,Spherometer,Torometer.

    2) Spherical/Toric generator,Toric Lap cutter.

    3) Spherical/Toric fining & polishing machine.

    4) 65C/47C Blocking alloy,Surface protection tape,Fining compound.

    C. Ophthalmic Equipments, Instruments.

    1) Ophthalmic chairs&stands, Phoropter (Refractor,View tester), Digital refractor(Auto phoropter), Auto chart projector,Trial lens set, Digital pupilometer(PD meter).

    2) Slit lamp, Auto refractometer&keratometer,Auto refractometer, Keratometer,Retinoscope, Ophthalmoscope, Non-contact tonometer,Applanation tonometer, Auto campimeter,A scan, A/B scan,.

    3) Operation microscope, Operation table,Micro ophthalmological surgical appliances.

    D. Optical Equipments, Instruments.

    1) Patternless auto edger, Auto lens edger, Pattern marker, Layout blocker.

    2) Auto lens groover, Lens drilling machine, Auto lens polisher (Buffer).

    3) Hand lens edger, Ultrasonic cleaner, Frame heater/warmer.

    4) Auto lensmeter, Lensmeter (Vertometer).

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