Lets start with an obvious question. What Color is 565nm ?
Next. The One that everyone wants to know. The Wavelength.
An Expanded view of the Spectrum. This DPSS laser has quite a wide bandwidth. Ranging from 565nm up to 571nm. That is quite wide for a DPSS laser. It's obviously not 561nm.
I measured the output power with 2 LPM's. I suspect the Sanwa PL1 is the more accurate one at Low Power Levels.
The Sanwa PL1 reads 30 mW and the Pocket Laser Power Meter from the Laser Pointer Store reads 25 mW.
The Output seems quite stable. Variation was a few mW over a few minutes.
I measured the Voltage and Current in the Pump Diode. It's 1.6 Volts at 1100 mA. It's pumping at 1.76 Watts.
Some Images of the Laser head. Sorry about the soft Focus. It's a typical Chinese Heatsink with the module buried deep inside. Looking into the output end I can see the Collimation lens has an AR coating on it. A Blue tint.
An Image of the driver. Again it's a standard Chinese driver as found in most Laser Light Show Units.
Dam this is a hard laser to try and get decent beam shots. 25-30 mW is not very bright.
NOTE: I used a Cannon camera and the Color is Wrong on the beam. I also tried with my Mobile phone and the color was even more green. Try and imagine these Beam Shots but in the Color from the top of this post. It seems a CMOS sensor is not capable of detecting 565 nm. The Camera is making it much greener. The Color of the beam truly is very close to the first image I posted about the color of 565 nm.
Anyway, Here is my first effort at capturing this Lasers Beam. The second image is a 4 second exposure.
I will try and do some outdoor shots on Sat Night. I should be up at the Astronomy club for our viewing night. There is probably nothing I can do make the color accurate. It's just the way the camera works. 565nm is a narrow area of the spectrum were color changes quickly.
Next. The One that everyone wants to know. The Wavelength.
An Expanded view of the Spectrum. This DPSS laser has quite a wide bandwidth. Ranging from 565nm up to 571nm. That is quite wide for a DPSS laser. It's obviously not 561nm.
I measured the output power with 2 LPM's. I suspect the Sanwa PL1 is the more accurate one at Low Power Levels.
The Sanwa PL1 reads 30 mW and the Pocket Laser Power Meter from the Laser Pointer Store reads 25 mW.
The Output seems quite stable. Variation was a few mW over a few minutes.
I measured the Voltage and Current in the Pump Diode. It's 1.6 Volts at 1100 mA. It's pumping at 1.76 Watts.
Some Images of the Laser head. Sorry about the soft Focus. It's a typical Chinese Heatsink with the module buried deep inside. Looking into the output end I can see the Collimation lens has an AR coating on it. A Blue tint.
An Image of the driver. Again it's a standard Chinese driver as found in most Laser Light Show Units.
Dam this is a hard laser to try and get decent beam shots. 25-30 mW is not very bright.
NOTE: I used a Cannon camera and the Color is Wrong on the beam. I also tried with my Mobile phone and the color was even more green. Try and imagine these Beam Shots but in the Color from the top of this post. It seems a CMOS sensor is not capable of detecting 565 nm. The Camera is making it much greener. The Color of the beam truly is very close to the first image I posted about the color of 565 nm.
Anyway, Here is my first effort at capturing this Lasers Beam. The second image is a 4 second exposure.
I will try and do some outdoor shots on Sat Night. I should be up at the Astronomy club for our viewing night. There is probably nothing I can do make the color accurate. It's just the way the camera works. 565nm is a narrow area of the spectrum were color changes quickly.
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