Low Softening Temperature Optical Glass
Optical glass that can be molded at lower temperatures than our conventional optical glasses, while maintaining the same general optical properties.
Low Softening Temperature Optical Glass
Ohara’s Low Softening Temperature Optical Glass is a series of glass types that can be molded at lower temperatures than our S-type optical glass types, while maintaining the same general optical properties (refractive indices, dispersions, etc.). These glasses are environmentally safe as they do not contain Lead and Arsenic in their composition, and they allow for a simplified waste stream disposal.
These materials 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. These glass types are available in strip form, blanks or Fine Gobs.
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 | 61.20 | 527 | 567 | 2 | 4 | 2.82 |
| L-BAL35P | 592610 | 1.59208 | 61.00 | 527 | 567 | 2 | 4 | 2.82 |
| L-BAL42 | 583594 | 1.58313 | 59.40 | 506 | 538 | 2 | 4 | 3.05 |
| L-BAL42P | 586592 | 1.58593 | 59.24 | 506 | 538 | 1 | 3 | 3.05 |
| L-BAL43 | 586597 | 1.58573 | 59.70 | 493 | 535 | 1 | 4 | 3.05 |
| L-BSL7 | 516641 | 1.51633 | 64.10 | 498 | 549 | 2 | 1 | 2.38 |
| L-LAH53 | 806409 | 1.80610 | 40.90 | 574 | 607 | 1 | 4 | 4.49 |
| L-LAH84 | 808405 | 1.80835 | 40.55 | 527 | 568 | 1 | 3 | 4.62 |
| L-LAH85V | 854404 | 1.85400 | 40.40 | 613 | 653 | 1 | 3 | 5.25 |
| L-LAH90 | 832401 | 1.83220 | 40.10 | 607 | 644 | 1 | 4 | 4.65 |
| L-LAH91 | 765491 | 1.76450 | 49.10 | 611 | 644 | 1 | 4 | 4.29 |
| L-LAH94 | 861371 | 1.86100 | 37.10 | 593 | 628 | 1 | 4 | 4.89 |
| L-LAL13 | 694532 | 1.69350 | 53.20 | 534 | 575 | 1 | 4 | 3.69 |
| L-LAL15 | 693529 | 1.69304 | 52.93 | 525 | 562 | 1 | 4 | 3.66 |
| L-LAM60 | 743493 | 1.74320 | 49.30 | 541 | 581 | 1 | 4 | 4.20 |
| L-LAM69 | 731405 | 1.73077 | 40.50 | 497 | 529 | 1 | 3 | 3.24 |
| L-TIM28 | 689311 | 1.68893 | 31.10 | 504 | 539 | 2 | 1 | 2.88 |
| L-TIM28P | 695307 | 1.69453 | 30.66 | 504 | 539 | 1 | 1 | 2.88 |
