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Low Softening Temperature Optical Glass

Ohara's Low Softening Temperature Optical Glasses are a series of glasses that have been developed to be molded at lower temperatures than our conventional optical glasses, while maintaining the same general optical properties (refractive indices, dispersions, etc.). These glasses are environmentally safe as they do not contain PbO and As2O3 in their composition and they allow for a simplified waste stream disposal.

The Low Softening Temperature Optical Glasses are used for Ohara's Fine Gobs for molding operations and help to extend the life of the mold pressing tools by minimizing the reaction between the softened glass and the mold materials. The Low Softening Temperature Optical Glasses types are available in strip form, blanks or Fine Gobs.

Ohara L-Type Glass Catalog Data (Excel Format)


The table below shows the optical properties of our key Low Softening Temperature Optical Glasses.

Type Code nd vd Tg (deg C) At (deg C) RW(P) RA(P) S.G.
L-BAL35 589612 1.58913 61.2 527 567 2 4 2.82
L-BAL42 583594 1.58313 59.4 506 538 2 4 3.05
L-BAL43 586597 1.58274 1.58573 1.59255 1.59786 59.7 3.05 340/285
L-BBH1 102168 2.08390 2.10205 2.14961 2.19378 16.8 6.57 (470)/430
L-BSL7 516641 1.51633 64.1 498 549 2 1 2.38
L-LAH53 806409 1.80610 40.9 574 607 1 4 4.49
L-LAH84 809404 1.80860 40.4 527 568 1 3 4.62
L-LAH85V 854404 1.84772 1.85400 1.86887 1.8809 40.38 5.25 380/340
L-LAH86 903310 1.90270 31.0 578 610 1 3 4.90
L-LAH90 832401 1.82605 1.83220 1.84680 1.85866 40.1 4.65 415/340
L-LAH91 765491 1.75981 1.76450 1.77538 1.78399 49.1 4.29 365/275
L-LAH94 861371 1.85416 1.86100 1.87737 1.89080 37.10 4.89 (390)/350
L-LAL12 678549 1.67990 54.9 562 600 1 4 3.48
L-LAL13 694532 1.69350 53.2 534 575 1 4 3.69
L-LAL15 693529 1.68906 1.69304 1.70216 1.70932 52.93 3.66 345/-
L-LAM60 743493 1.74320 49.3 541 581 1 4 4.2
L-LAM69 731405 1.73077 40.5 497 529 1 3 3.24
L-TIM28 689311 1.68893 31.1 504 539 2 1 2.88
 

Optical Glass S-FPL51l-lah83l-lah83L-TIM28l-lah83l-lah83l-lah83l-lah83S-FPL53S-FPL51S-FSL5L-BSL7L-BAL35L-PHL2L-BAL42L-TIM28L-LAL12 L-LAL13 L-LAM69 L-LAM60 L-LAH81 L-LAH53 l-lah83 l-nbh54

 

L-LAM72L-LAM69 L-LAM60L-LAH81 L-LAH53l-lah83 l-nbh54