Item

Name

Parameter

Remark

Optical

Transmittance

≥ 89%

Wavelength 380 ~ 2000nm

Max. Pitch

  P

0.75P

(Length)Z=2πP/

Effective diameter

  d

Lens diameter 60~70%

 Tolerance

±0.75%

In same ion exchange batch

±2.5%

For different ion exchange batches

Physics

Diameter tolerance

+ 0.005/-0.010mm

Length tolerance

+ 0/-0.04mm

Max. mechanical & polishing tolerance

2.5% general length

Adjusted according to  variation

Face angle

0°, 2°, 4°, 6°, 8°

Ellipticity

3 μm

Dmax - Dmin

End face verticality

6mrad max.

Thermal expansion coefficient

10×10 ^-6/℃

Other

Temperature

350℃

Max. temp. of operation

Humidity

Store in desiccant

Surface

quality

Pinholes / particles

Defects larger than 30 μm in diameter are not allowed.

Defects smaller than 10 μm in diameter are allowed.

Up to defects with diameter between 10 μm to 30 μm are allowed.

Scratches

Scratches wider than 5 μm are not allowed.

Scratches narrower than 2 μm are allowed.

Up to the scratches with 5 μm Max. width and 200 μm Max. length are allowed.

Chips

Chips are not allowed within the concentric area of 90% of the lens diameter.

Numerical

Aperture

Diameter

Pitch

Wavelength (nm)

0.46

1.0mm

0.23, 0.25

630

780

830

1310

1550

1250~1650

1.8mm

0.14, 0.18, 0.23

0.24, 0.25, 0.35

3.0mm

0.11, 0.20

0.60

1.8mm

0.22, 0.29

Wavelength

(nm)

Type

R

H

N.A. (2θ)

0.46 (55°)

0.60 (74°)

Diameter

Φ1.0mm

Φ1.8mm

Φ3.0mm

Φ1.8mm

630

No

1.611

1.658

0.606

0.339

0.207

0.420

Z (0.25P)

2.59

4.63

7.59

3.74

830

No

1.601

1.646

0.599

0.332

0.203

0.413

Z (0.25P)

2.62

4.73

7.73

3.80

1310

No

1.594

1.638

0.597

0.330

0.199

0.406

Z (0.25P)

2.64

4.76

7.89

3.87

1550

No

1.591

1.634

0.571

0.327

0.198

0.404

Z (0.25P)

2.75

4.78

7.93

3.89