ne νe nF-nC

λ80

λ70

λ080 λ005

1

4

2

512

10

Strain Point StP () 589

Annealing Point AP () 617

Transformation Temperature Tg () 632

Yield Point At () 662

Softening Point SP () 709

550 6 Expansion Coefficients 71

α (10-7

) 84

188 Thermal Conductivity k (WmK) 0741

t C He-Ne D e F g

25 31 31 33 36 43 51

26 32 32 35 38 45 53

26 33 33 36 39 47 55

27 34 34 37 40 48 57

28 35 35 38 42 50 59

28 36 36 39 43 52 61

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(+100~+300)

Dispersion nF-nC 0019003

Dispersion 0019247

Deviation of Relative Dispersions Δθfrom Normal

ΔθCt -00002

ΔθCA 00008

290

350 006

360 037

θdC 02955

θeC 05328

θgd 12810

Code(d) 762401Code(e) 767398

S-LAM55

Refractive Index nd

176200Abbe Number νd 4010

Refractive Indices Partial Dispersions

λ(μm) nC-nt 0013960

1762001

Refractive Index 1766509 Abbe Number 3982

n1970 197009 172640 nd-nC 0005616

n2325 232542 172020 nC-nA 0006182

n1129 112864 173998 ng-nd 0024342

n1530 152958 173328 ne-nC 0010124

ns 085211 174695 nh-ng 0009453

nt 101398 174242 ng-nF 0010955

nr 070652 175327 nC-nt 0014843

nA 076819 175020 ni-ng 0026457

nC 064385 175727 nF-ne 0010006

nC 065627 175639 ne-nC 0009241

nD 058929 176183

nd 058756 176200 Relative Partial Dispersions

nHe-Ne 06328 175810 ni-nF 0036285

ne 054607 176651

nF 048613 177539

θCt 07346

θCA 03253

ng 0435835 178634

nF 047999 177652

nHe-Cd 044157 178487

165450323E-01 θFe 05199

ni 0365015 181280

nh 0404656 179580 θgF 05765

θhg 04974

A1 185412979E+00

Constants of Dispersion Formula

θig 13923

θCt 07712

θeC 04801

θiF 18852

400

0989

500 0993

550

B2 514050980E-02

B1 108438152E-02 440 0976

460 0984

Δθgd -00004 0997

0932

420 0963A3 127255422E+00

A2

Weathering Resistance(Surface) Group W(S)

B3 109986837E+02

Chemical Properties

Water Resistance(Powder) Group RW(P)

Acid Resistance(Powder) Group RA(P)

480

Δθig 00031

ΔθgF -00001 600

Mechanical Properties

Phosphate Resistance PR 900 0998

1000 0998

1200 0998

Acid Resistance(Surface) Group SR

Thermal Properties

800 0999

Range of Temperature dndT relative (10-6

)

-20~ 0 422

Youngs Modulus E (108Nm

2) 967

Rigidity Modulus G (108Nm

2) 374

1400 0995

1600 0994

1800 0986Poissons Ratio σ 0292

Knoop Hardness Hk[Class]

Abrasion Aa 145

Photoelastic Constant β (nmcm105Pa)

(-30~+70)

60~80

20~40

40~60

OHARA 17-04

0~20

()

-40~-20

Remarks

280

RB G

000 143 146

Internal Transmittance

λ(nm) τ10mm

Coloring

405λ5 350

Internal transmission

378 350

CCI

2000 0970

310

320

330

340

300

370 067

380 082

390 089

0997

650 0997

700 0998

Temperature Coefficients of Refractive Index

2200 0923

2400 078

Other Properties

Bubble Quality Group B

Specific Gravity d