| Measurements | M²x, M²y, Kx, Ky, BPPx, BPPy |
| (Statistical results | Width at waist Wx, Wy |
| are available on | Waist location Zx, Zy |
| all measurements) | Quantitative measurements, many ISO cpmpliant |
| | Rayleigh X, Y |
| | Astigmatism |
| | Asymmetry ratio |
| Wavelength Range | |
| Different lenses are needed for different wavelength regions. |
| The M²-200s model include 3 standard lenses with nominal 300mm focal lengths. See below. | The M²-200 model comes with only one lens. Additional lenses can be ordered separately and interchanged within a single model. |
| M²-200s-FW | 266 - 587nm (included) | M²-200-FW-VIS | 400 - 850nm | | | 400 - 750nm (included) | M²-200-FW-NIR | 1064nm | | | 650 - 1300nm (included) | M²-200-FW-BB | 266 - 1300nm | | | 1000 - 1300nm (optional) | | | | | | Lenses to order | *-VIS 500mm f.l. | | | | | *-NIR 500mm f.l. | | | | | *-BB 450mm f.l. | |
| Attenuation Range Nominally from ND 0 to ND 4.8. Actual values vary with wavelength. (Older M²-200 models will vary) |
| Beam Size | M²-200s 0.5mm - 10mm |
| | M²-200 1mm - 10mm |
| | varies with wavelength, waist size and location, and M² |
| Damage Limits¹ | |
| Camera | 0.15 uW/cm² CW mode for a 10 mm input beam diameter |
| | 1.0 uJ/cm² pulse mode for a 10 mm input beam diameter |
| | both of the above for an M² =1 @ 1064nm |
| ¹ CCD cameras can be damaged by power in excess of 100 mW/cm² or energy in excess of 100 mJ/cm². The M²-200/200s employs a focusing optic. While it may be that the laser input power or energy measures well below this damage threshold, it can easily exceed these levels when focused onto the camera sensor. Use caution and error on the side of safety. CCD cameras can be costly to repair or replace. |
| General | |
| Accuracy | ±5% typical, ±12% waist location and Rayleigh length typical (Note: Accuracy can be degraded by a variety of situations) |
| Measurement Cycle Time | 2-3 minutes typical, depending on setup conditions and operating mode. |
| Camera Attachment | Std C-mount, 90° camera on axis rotation |
| Translation System | Step motor-driven lead screw |
| Translation Pitch | 4 mm/rev optical pitch |
| Step Angle | 1.8° (200 steps/rev) |
| Sample Range | M² - 200 s 190 - 600 mm, typical |
| | M² - 200 380 - 1200 mm, typical |
| Camera Specifications (for GRAS20 camera) |
| Imager | 1/1.8" CCD, 1600 x 1200 pixels |
| Dynamic Range | 12 bit A to D |
| Frame Rates | 7.5 FPS (at full resolution) |
| Pixel size | 4.4um x 4.4um |
| Gain | 0 to 25dB |
| Shutter Control | Programmable from 110us to 70ms |
| S/N Ratio | 59dB at min gain |
| Trigger Input | Edge sensitive 3.3 / 5Vdc LVTTL / TTL (positive or negative, user programmable) |
| | Minimum pulse width 10us |
| Trigger Out | External Trigger cable provided. |
| Voltage Requirement | 3.3Vdc LVTTL, Programmable |
| Power Consumption | Powered over Firewire Cable |
| | <3.5watts |
| Dimensions | 44mm (1.74") wide, 29mm (1.14") tall and 66mm(2.6") deep |
| Mass | 104g (3.7oz) |
| Environmental |
| Storage Temperature | -30°C to 65°C |
| Storage Humidity | 95% maximum (non-condensing) |
| Operating Temperature | 10°C to 40°C |
| Operating Humidity | 95% maximum (non-condensing) |
| Power Requirements* |
| Line Voltage | 95V AC to 250V AC |
| Line Frequency | 47Hz to 63Hz |
| Maximum Power | 4.5 Watts |
| * For the Optical Train only. The PC computer supplies the power for the system components, such as the CCD camera. An external power supply is provided for Laptop computer use. |
| Physical |
| Weight | M²-200… 5.9 Kg (without camera) |
| | M²-200s…6.8 Kg (without camera) |
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