This shows the beam aimed near to the camera. The room had been filled with the smoke from a single cigarette.
This shows the beam aimed away from the camera, at the bass driver of my speaker. I chose this because it's black, and I didn't want the main spot to overexpose the picture.
Here the beam is aimed at a nice crystal decanter sitting on top of the speaker.
This shows the intense green light causing a crystal of pink calcite to flouresce an orangish colour. It's not very clear in this picture; it's easier to see in real life. The picture is overexposed by the green light.
Here you can see the same orange flourescence effect in some pink perspex. You can also see the beam undergoing total internal reflection, bouncing off the walls, following a zigzag path. The focus isn't quite right in this picture, but it's visible nevertheless.
This shows the laser pointer's DPSS module and driver board, and, nearer the camera, the screw cap containing the collimating lens and IR filter, which screws in to the black tube at the right of the module.
The current-adjusting trimmer can be seen just to the right of the white pushbutton switch, which is itself just to the right of the spring which forms the NEGATIVE terminal. The trimmer has been adjusted to the maximum current setting, which on my module, causes the module to draw about 270mA from the supply. Note that maximum current is achieved by rotating the trimmer ANTICLOCKWISE until it reaches the position shown. Further rotation causes the current to drop to near zero. The position of the trimmer can be identified by noting that there is a flat face on the otherwise circular metal top of the trimmer. In the picture it is facing towards the white pushbutton switch.
The POSITIVE connection to the module is via the outer casing of the pointer (not shown), and then through the big brass unit which screws in to the black tube at the right. The IR pump diode is mounted in this brass unit, and it is via this that the diode is (albeit poorly) heatsinked ultimately to the case and to the black tube. The diode has THREE connections, one to the case and thereby to the brass unit, and the other two visible here emerging just from the left of the brass assembly and then soldered onto the extreme right-hand side of the driver PCB.
The black tube has six holes drilled at approximately 60 degree intervals. Three of them, two of which are JUST visible here, either side of the larger, more clearly visible hole, provide access to tiny hex adjusting screws which adjust the position (relative to the main axis) of an aluminium assembly on which I presume is mounted one or both of the laser crystals.
This shows the collimating end cap and its internally-mounted lens/filter in better focus, and the module viewed from end on with the output end pointing upwards. The three hex adjusting screws adjust the position relative to the central axis of the aluminium assembly with the small hole, which is visible inside the black tube.