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#2
posted to rec.boats
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Far OT for my creative friends.
John H wrote:
On Mon, 15 Jan 2018 13:47:33 -0500, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com Greg could buy this for me. I'd take out the laser and send it to him -- free! http://www.kimberamerica.com/micro-9-cc Such a deal! Over $100 off MSRP here but I'm sure you can find it cheaper! https://www.eurooptic.com/KIMBER-330...m--330010.aspx |
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#3
posted to rec.boats
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Far OT for my creative friends.
On Mon, 15 Jan 2018 18:48:43 -0500, Alex wrote:
John H wrote: On Mon, 15 Jan 2018 13:47:33 -0500, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com Greg could buy this for me. I'd take out the laser and send it to him -- free! http://www.kimberamerica.com/micro-9-cc Such a deal! Over $100 off MSRP here but I'm sure you can find it cheaper! https://www.eurooptic.com/KIMBER-330...m--330010.aspx No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. |
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#4
posted to rec.boats
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Far OT for my creative friends.
On Mon, 15 Jan 2018 18:54:03 -0500, John H
wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. |
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#5
posted to rec.boats
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Far OT for my creative friends.
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#6
posted to rec.boats
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Far OT for my creative friends.
On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote:
On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. |
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#7
posted to rec.boats
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Far OT for my creative friends.
On Tue, 16 Jan 2018 06:32:06 -0800 (PST), Its Me wrote:
On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. I saw that also. I was thinking of it when I wrote the sentences above. 'Blindspot', I think. |
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#8
posted to rec.boats
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Far OT for my creative friends.
Its Me wrote:
On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. Many real suppressors barely make a sound. You just hear the action of the firearm unlike the strange sound they use in movies. |
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#9
posted to rec.boats
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Far OT for my creative friends.
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#10
posted to rec.boats
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Far OT for my creative friends.
On Tue, 16 Jan 2018 09:59:31 -0500, Keyser Soze
wrote: On 1/15/18 8:40 PM, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I've never had a laser sight, but I do have a laser sighting in kit, and it does what it is supposed to do...it speeds up the process of sighting in a firearm that's new to you, or sighting in a new red dot or scope. I change out and swap around the add-on sights on my rifles, and the sighting in kit makes it easy-peasy to get right on paper. CZ does a very good job of sighting in its firearms before it ships them. I was shooting bullseyes with the SCORP right out of the box with the "iron" sights. I have always had pretty good luck with the factory sights. It never ocurred to me they would be that far off. Precision shooting with iron sights is more art than science anyway. My 2 "target" pistols (a target model Woodsman and a OM Colt 38) have the Micro adjustible rear sight and I have tweaked them a bit. My .44 Ruger Carbine had scope mounts but I always thought a scope sort of defeated the purpose of a fast handling little carbine. A red dot might be appropriate. I just never used it enough to justify the cost. The 4+1 ammo capacity sort of limits its usefullness. |
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