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03-15-2017, 06:16 AM #17
 Super Moderator Join Date: Jan 2014 Location: Qatar, land of the hot footed. Posts: 9,598 Rep Power: 1867494
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Re: Visible at daylight

Bite; my 4 watt 532nm is not visible in daylight outside, only dimly inside during the day.

__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3

03-15-2017, 08:12 AM #18
 Class 2M Laser Join Date: Sep 2016 Location: AL, USA Posts: 529 Rep Power: 449432
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Re: Visible at daylight

On second thought, may want to cover some windows, dim the lights, and add some particulate or dense vapor into the air aswell. Unless you have a US gov't TLA's budget, you will not get a laser to meet this requirement.
__________________
1-30mW 473nm BW-Tek labby (WIP)
305mW 473nm Labby
42mW 520nm Laserlands Unit
4.2mW 532nm LaserGlow Anser (for actual pointing)
22mW 532nm LaserGlow Aries

Meter: Hyperion Cuprum

Been here since 2008. Not new, just returning.

03-15-2017, 08:34 AM #19
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Call Me Latte
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Re: Visible at daylight

Okay guys ty for your answers so the conclusion is a daylight visible handheld laser does not exist.. Or it is so expensive. Thanks for your answers and care, have a nice day. So I wont refound my 303.

03-15-2017, 08:42 AM #20
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Call Me Latte
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Re: Visible at daylight

Btw just wondering how this guys lasers are soo visible in yellow light top? Is he using a mist machine or something? Mine's cannot even compared with those. That video and others like that made me ask this question.

Last edited by Call Me Latte; 03-15-2017 at 08:42 AM.

03-15-2017, 08:51 AM #21
 Class 2M Laser Join Date: Sep 2016 Location: AL, USA Posts: 529 Rep Power: 449432
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Re: Visible at daylight

__________________
1-30mW 473nm BW-Tek labby (WIP)
305mW 473nm Labby
42mW 520nm Laserlands Unit
4.2mW 532nm LaserGlow Anser (for actual pointing)
22mW 532nm LaserGlow Aries

Meter: Hyperion Cuprum

Been here since 2008. Not new, just returning.

03-15-2017, 09:15 AM #22
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Call Me Latte
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Re: Visible at daylight

wow O.o

03-15-2017, 09:26 AM #23
 Class 2M Laser Join Date: Sep 2016 Location: AL, USA Posts: 529 Rep Power: 449432
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Re: Visible at daylight

Quote:
 Originally Posted by Call Me Latte wow O.o
To give you an idea of what some fog can do.

TOP TO BOTTOM:
105mW 520nm
310mW 473nm
<1mW 632.8nm HeNe
__________________
1-30mW 473nm BW-Tek labby (WIP)
305mW 473nm Labby
42mW 520nm Laserlands Unit
4.2mW 532nm LaserGlow Anser (for actual pointing)
22mW 532nm LaserGlow Aries

Meter: Hyperion Cuprum

Been here since 2008. Not new, just returning.

03-15-2017, 09:34 AM #24
 Junior Member Join Date: Mar 2017 Posts: 17 Rep Power: 0
Call Me Latte
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Re: Visible at daylight

Yea when I smoke in the room, the beam visibility significantly increases. How often should I charge my battery for a 100mw or 200mw I am not sure. I read that it determined by the beams visibility. When it fades you charge it right?

Last edited by Call Me Latte; 03-15-2017 at 09:34 AM.

03-15-2017, 09:42 AM #25
 Class 2M Laser Join Date: Sep 2016 Location: AL, USA Posts: 529 Rep Power: 449432
Class 2M Laser

Join Date: Sep 2016
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Posts: 529
Rep Power: 449432
Re: Visible at daylight

Im not sure on that one. I just have a habit op pulling my batteries every once in a while and checking the voltage to determine when to charge them. On my pen build, when I notice a power decrease I swap batteries as it absolutely eats ni-mh aaa's when I run it.

I'd just have to say if you notice a major loss of power after running for a while, probably can't hurt too badly to swap batteries or charge it if it bugs you.
__________________
1-30mW 473nm BW-Tek labby (WIP)
305mW 473nm Labby
42mW 520nm Laserlands Unit
4.2mW 532nm LaserGlow Anser (for actual pointing)
22mW 532nm LaserGlow Aries

Meter: Hyperion Cuprum

Been here since 2008. Not new, just returning.

03-15-2017, 09:47 AM #26
 Junior Member Join Date: Mar 2017 Posts: 17 Rep Power: 0
Call Me Latte
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Re: Visible at daylight

Yea fair eough. I am just afraid of harming them by charging constantly but if that doesnt have any bad effects on battery then no problem.

03-15-2017, 09:55 AM #27
 Omnipotent Join Date: Jan 2016 Location: ⚡⚡̶⚡̶̷̲̅ Posts: 384 Rep Power: 11031
Vision
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Re: Visible at daylight

That 310mW 473nm looks great. I can't wait for my 07E to be completed. Gonna try 5A then 5.5 and go nuts with it.

03-15-2017, 10:30 AM #28
 Class 2M Laser Join Date: Sep 2016 Location: AL, USA Posts: 529 Rep Power: 449432
Class 2M Laser

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Re: Visible at daylight

Quote:
 Originally Posted by Call Me Latte Yea fair eough. I am just afraid of harming them by charging constantly but if that doesnt have any bad effects on battery then no problem.
I wouldn't charge them constantly as it might not be the best for them. I may just be a little OCD about fully discharging my cells before recharging though

And yes, that much dpss 473 is amazing. Add a little smoke and it is simply breath taking.
__________________
1-30mW 473nm BW-Tek labby (WIP)
305mW 473nm Labby
42mW 520nm Laserlands Unit
4.2mW 532nm LaserGlow Anser (for actual pointing)
22mW 532nm LaserGlow Aries

Meter: Hyperion Cuprum

Been here since 2008. Not new, just returning.

Last edited by CynicalBrad; 03-15-2017 at 10:32 AM.

03-15-2017, 12:01 PM #29
 Class 3B Laser Join Date: Jun 2015 Location: Brentwood, England (Near London) Posts: 4,640 Rep Power: 1862359
CurtisOliver
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Re: Visible at daylight

Quote:
 Originally Posted by Alaskan Bite; my 4 watt 532nm is not visible in daylight outside, only dimly inside during the day.
Alaskan, has your laser got a large beam diameter? By rights 4W should indeed be somewhat visible during daylight and should be without question visible indoors. I have a ~600mW with a 2.5-3mm beam and that is visible in a lit room. Do you have any images?
__________________
Notable products/sites:

Jet Lasers offers various high quality Diode/DPSS Portables in their PL-E Pro hosts. Jet Lasers are known for their quality and are respected on LPF.
Jetlasers PLE Pro's

Dragon Lasers offers the best option for 589nm (Yellow) Laser pointers.
Dragon Lasers Yellow Laser Pointers

Sanwu are known to be very high quality and every newcomer should check them out.
Sanwu Home

Bang good is a good source for many electrical items and are often cheap and reliable.
Bang Good Home

For reliable safety goggles visit Survival Laser. Use LPF445 for a 10% member discount.
Eagle Pair Safety Goggles

Which company should I buy from? By Sta

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Wavelength to RGB Converter

03-15-2017, 12:06 PM #30
 Super Moderator Join Date: Jan 2014 Location: Qatar, land of the hot footed. Posts: 9,598 Rep Power: 1867494
Super Moderator

Join Date: Jan 2014
Location: Qatar, land of the hot footed.
Posts: 9,598
Rep Power: 1867494
Re: Visible at daylight

Mine has 5mm beam, fairly wide.

Day time photo, light coming in kitchen window. Outside you can't see any hint of a beam.

__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 03-15-2017 at 12:11 PM.

03-15-2017, 12:10 PM #31
 Class 3B Laser Join Date: Jun 2015 Location: Brentwood, England (Near London) Posts: 4,640 Rep Power: 1862359
CurtisOliver
Class 3B Laser

Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 4,640
Rep Power: 1862359
Re: Visible at daylight

Ok, that explains why. A 3mm beam will appear brighter than a 5mm+ beam. Your beam will be similar to a <2W 3mm in equivalence.
__________________
Notable products/sites:

Jet Lasers offers various high quality Diode/DPSS Portables in their PL-E Pro hosts. Jet Lasers are known for their quality and are respected on LPF.
Jetlasers PLE Pro's

Dragon Lasers offers the best option for 589nm (Yellow) Laser pointers.
Dragon Lasers Yellow Laser Pointers

Sanwu are known to be very high quality and every newcomer should check them out.
Sanwu Home

Bang good is a good source for many electrical items and are often cheap and reliable.
Bang Good Home

For reliable safety goggles visit Survival Laser. Use LPF445 for a 10% member discount.
Eagle Pair Safety Goggles

Which company should I buy from? By Sta

Use this link if you want the chance of winning free bitcoin.
Every hour you can roll for some free satoshi which you can then spend on lottery tickets.
Lotteries are weekly and often see >1 BTC prize totals worth around \$10,000.
It doesn't cost you anything and you could end up winning big, meaning you could have more money for lasers.

Free Bitcoin Lottery

Wavelength to RGB Converter

03-15-2017, 12:41 PM #32
 Super Moderator Join Date: Jan 2014 Location: Qatar, land of the hot footed. Posts: 9,598 Rep Power: 1867494
Super Moderator

Join Date: Jan 2014
Location: Qatar, land of the hot footed.
Posts: 9,598
Rep Power: 1867494
Re: Visible at daylight

At night into a very low ceiling of cloud/fog.

__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3

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