Coherent FieldMaxII-TOP Dokumentacja Pobierz pdf (Strona 80)

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ModeMaster PC systems are available in eight standard congurations (all include scanning head, 5-axis mount, USB control/

interface console, cables, PC software and manual). All congurations provide measurements in four wavelength ranges, with

two divergence ranges (high-divergence and low-divergence) within each wavelength range. Use the following steps, along

with the Selection Nomogram Chart and Conguration Table (below), to select a ModeMaster PC conguration.

1. Choose between the four spectral ranges:

UV (220 to 680 nm), VIS (340 to 1000 nm),

NIR (800 to 1800 nm) and IR (1800 to

15,000 nm).

2. Determine the approximate divergence of your

laser beam and use the Selection Nomogram

(Divergence vs. Wavelength) Chart to select the

low-divergence or high-divergence conguration.

3. Conrm that your beam size is <25 mm

diameter for the low-divergence conguration

or <12 mm for the high-divergence conguration.

4. Use the table below to determine the part

number of the ModeMaster PC conguration

selected, and to verify all other beam

specications.

5. If more than one ModeMaster PC conguration

appears to be needed in order to cover all

required beam parameter ranges, optional

Scanning Head Modular Components can

be ordered to change the conguration of the

ModeMaster PC system to cover other ranges

(see next page for details).

100 200 400 600 800 1,0002,000 5,000 10,000 20,000

0.1

0.2

0.3

0.4

0.6

1.0

10.0

20.0

VIS

NIR IR

0.8

2.0

4.0

6.0

8.0

Selection Nomogram

Wavelength (nm)

Divergence (mr)

Low

Divergence

Low

Divergence

High

Divergence

High

Divergence

= 1

Laser

Cross-

Reference

Index

POWER

& ENERGY

Power

Sensors

Energy

Sensors

Custom

& OEM

BEAM

DIAGNOSTICS

CALIBRATION

& SERVICE

INDICES

Product

Name

Index

Power

& Energy

Meters

Name UV Low- UV High- VIS Low- VIS High- NIR Low- NIR High- IR High- IR Low-

Divergence Divergence Divergence Divergence Divergence Divergence Divergence Divergence

Model MM-1 MM-1S MM-2 MM-2S MM-3 MM-3S MM-4 MM-5

Spectral Range (µm) 0.22 to 0.68 0.34 to 1.00 0.80 to 1.80 1.80 to 15

Detector Type Silicon Germanium Pyrolelectric

INPUT BEAM REQUIREMENTS AT TEST WAVELENGTH

Test Wavelength

351 nm 514 nm 1.06 µm 10.6 µm

Minimum Power

7.5 mW

2.5 mW

400 mW

Maximum Power

10W

25W

2.5W 20W

Noise <2% RMS and <5% peak-to-peak

Min. Divergence (mrad) 0.24 0.46 0.24 0.46 0.25

0.47

2.7 1.3

Max. Divergence (mrad)

1.7 3.2 2.0 3.6 2.7 5.0 14 7.2

Max. Beam Diameter (mm)

25 12 25 12 25 12 12 25

Part Number 33-1843-000 33-2106-000 33-2221-000 33-2239-000 33-2387-000 33-2395-000 33-2429-000 33-2437-000

Standard Conguration

Selecting a ModeMaster PC System Conguration

ModeMaster PC

Wavelength-dependent quanlities are input power levels, and minimum and maximum divergence (see Notes 2, 5, 6).

Power levels are proportional to the inverse of the spectral response of the detector. The silicon detector peaks at 900 nm and is at half-peak sensitivity at 510 nm and 1050 nm.

The germanium detector peaks at 1500 nm and is at half-peak sensitivity at 1100 nm and 1650 nm. The pyroelectric detector has a at spectral response.

These limits can be reduced by a factor of 10 (higher sensitivity) by user-removal of the light-restricting aperture in front of the detector.

The maximum divergence limit is xed by the inability to accurately locate the internal waist when the internal beam diameter growth (over the span of the drum) is too slight.

Limits shown are for M

= 1 and test wavelength; limits scale as the square root of M

(test wavelength).

Minimum divergence in this wavelength range scales as the square root of M

(test wavelength).

Diameters are approximate; divergence takes precedence in choosing options. Refer to nomogram.

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 91 92

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