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Old 04-09-2017, 01:23 AM #17
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Default Re: Spectra Physics 155 HeNe

That's not an easy question to answer because every tube is kind of unique. The tubes were made to be put into service and run continuously. Honestly if it's lasted this long. Its not gonna leak again on a timescale that matters. The loss of helium will make it much harder for the tube to start and run, and will cost it some power. A few hours a month is probably more than adequate. Sam has her old one 19 that actually has to be run pretty much weekly, or it turns pink but it routinely clears up.

Look at the back part of the cathode and find the little ring. Directly above that there should be a thick black spot of barium getter on the glass. If that has turned white in places that means that it has taken on contamination overtime. If there is no spot then it probably was never fired. A lot of later tubes didn't always get a proper getter activation. My 156 has faint whisps of white, so i can tell it was attempted, but didnt reach flash temperature so only a very little bit of the barium vaporized. And that it has leaked, but minimally.

I have a 124 that works that i revived, if you want one but it wouldnt be cheap. I slightly overfilled it to help it last, but since its He4, the power isnt quite fully up to spec, since its not as efficient as the lighter isotope He3, which is generally what is used-though it is far more expensive.


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325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

405nm: Melles Griot RCS
430nm: Coherent D3 430-10
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, CNI GLP-473
476.5nm: Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser, Coherent Sapphire 488-20 OPSL

496.5nm: Argon Ion Line
501.7: Argon Ion Line
514.5nm: Argon Ion Line
520nm: Trustfire A8 Custom

532nm: CNI MGL-F-3W, Coherent Genesis MX Taipan OPSL, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm: Coherent Genesis MX Taipan OPSL
583.8nm: DPSS line
586.2nm: DPSS line
588.6nm: CNI PGL-M-80

591nm: DPSS line
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm: Raman HeNe line?
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.6nm: Laser Quantum IGNIS DPSS laser 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 04-09-2017, 05:06 AM #18
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Default Re: Spectra Physics 155 HeNe

Those old laser tubes are beautiful hand done works of glass art.

Fantastic pictures Diachi
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Old 04-09-2017, 05:25 AM #19
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Default Re: Spectra Physics 155 HeNe

Quote:
Originally Posted by Encap View Post
Those old laser tubes are beautiful hand done works of glass art.

Fantastic pictures Diachi
indeed. though if you think that's true, you should see the bare glasswork of a HeCd/HeSe. they're far more complex.
__________________
325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

405nm: Melles Griot RCS
430nm: Coherent D3 430-10
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, CNI GLP-473
476.5nm: Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser, Coherent Sapphire 488-20 OPSL

496.5nm: Argon Ion Line
501.7: Argon Ion Line
514.5nm: Argon Ion Line
520nm: Trustfire A8 Custom

532nm: CNI MGL-F-3W, Coherent Genesis MX Taipan OPSL, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm: Coherent Genesis MX Taipan OPSL
583.8nm: DPSS line
586.2nm: DPSS line
588.6nm: CNI PGL-M-80

591nm: DPSS line
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm: Raman HeNe line?
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.6nm: Laser Quantum IGNIS DPSS laser 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors

Last edited by ultimatekaiser; 04-09-2017 at 05:25 AM.
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Old 04-09-2017, 07:41 AM #20
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Default Re: Spectra Physics 155 HeNe

Quote:
Originally Posted by ultimatekaiser View Post
indeed. though if you think that's true, you should see the bare glasswork of a HeCd/HeSe. they're far more complex.

Stop it, you're making miss my HeCd lasers!

Quote:
Originally Posted by Encap View Post
Those old laser tubes are beautiful hand done works of glass art.

Fantastic pictures Diachi
Thanks Encap!
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Last edited by diachi; 04-09-2017 at 07:42 AM.
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Old 04-09-2017, 05:30 PM #21
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Default Re: Spectra Physics 155 HeNe

You know I realized I got mixed up on this stupid me - Sorry for my confusion.

I was thinking 125 not 124 - the big 6 foot behemoth.
Not the thin 124

Both are softseal - I have a 127 and sometimes the numbering on these gets me confused.

My 127 runs and is stable at about 40mw. So other than size and hassle I haven't seen a reason for a softseal. The 155's are cute for the size and tempting.

The 125 is the grand-daddy I was thinking of.

Ever seen one of those running? Are any of them still operational?

Quote:
Originally Posted by ultimatekaiser View Post
That's not an easy question to answer because every tube is kind of unique. The tubes were made to be put into service and run continuously. Honestly if it's lasted this long. Its not gonna leak again on a timescale that matters. The loss of helium will make it much harder for the tube to start and run, and will cost it some power. A few hours a month is probably more than adequate. Sam has her old one 19 that actually has to be run pretty much weekly, or it turns pink but it routinely clears up.

Look at the back part of the cathode and find the little ring. Directly above that there should be a thick black spot of barium getter on the glass. If that has turned white in places that means that it has taken on contamination overtime. If there is no spot then it probably was never fired. A lot of later tubes didn't always get a proper getter activation. My 156 has faint whisps of white, so i can tell it was attempted, but didnt reach flash temperature so only a very little bit of the barium vaporized. And that it has leaked, but minimally.

I have a 124 that works that i revived, if you want one but it wouldnt be cheap. I slightly overfilled it to help it last, but since its He4, the power isnt quite fully up to spec, since its not as efficient as the lighter isotope He3, which is generally what is used-though it is far more expensive.
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Old 04-09-2017, 06:12 PM #22
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Default Re: Spectra Physics 155 HeNe

Yeah a few of them. There are still some places that refill them too. I don't have one because I don't have a place to put one they weigh about 100 pounds. I used to clean and maintain one though. There's a couple of different variations of it. Huge hene. Odds are any that you run across will not be working. There's been a number of times I've seen them pop up on eBay for a few hundred dollars and can be refilled for a couple grand. Great research laser, but the 127 is generally considered superior overall except in power.

The power supplies are what are hard to find
__________________
325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

405nm: Melles Griot RCS
430nm: Coherent D3 430-10
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, CNI GLP-473
476.5nm: Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser, Coherent Sapphire 488-20 OPSL

496.5nm: Argon Ion Line
501.7: Argon Ion Line
514.5nm: Argon Ion Line
520nm: Trustfire A8 Custom

532nm: CNI MGL-F-3W, Coherent Genesis MX Taipan OPSL, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm: Coherent Genesis MX Taipan OPSL
583.8nm: DPSS line
586.2nm: DPSS line
588.6nm: CNI PGL-M-80

591nm: DPSS line
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm: Raman HeNe line?
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.6nm: Laser Quantum IGNIS DPSS laser 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors

Last edited by ultimatekaiser; 04-09-2017 at 06:13 PM.
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