djQUAN
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- May 27, 2013
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Since my 1.4W handheld has a momentary button and switches the driver to standby with the key switch on and button unpressed, It drives the laser diode at about 15-20mA so we get an LED effect as an "aiming beam" when burning. I've seen this before but didn't think about taking pics until now.
When pointing it to a wall and focused, you can clearly see the laser diode die shape and the spot where all the laser light is emitted (forgot what it is called).
In the following pic, you can see the large circle which is the diode case window. The rectangular object in the center is the laser diode die. The bright "aura" surrounding the die is the back part of the case directly behind the die being lit up. The dark portion below is the shelf where the die is mounted onto.
A shorter exposure time reveals where on the diode die facet the laser light is emitted. You can see here that on mine, it was off center. In another diode that I had, it was exactly in the middle of the top part of the die.
Sorry if this has been posted before, I didn't know what words to use to search of a previous topic.
When pointing it to a wall and focused, you can clearly see the laser diode die shape and the spot where all the laser light is emitted (forgot what it is called).
In the following pic, you can see the large circle which is the diode case window. The rectangular object in the center is the laser diode die. The bright "aura" surrounding the die is the back part of the case directly behind the die being lit up. The dark portion below is the shelf where the die is mounted onto.
A shorter exposure time reveals where on the diode die facet the laser light is emitted. You can see here that on mine, it was off center. In another diode that I had, it was exactly in the middle of the top part of the die.
Sorry if this has been posted before, I didn't know what words to use to search of a previous topic.
