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An Endurance laser lens pack + laser fixation ring & laser focusing ring

An Endurance laser lens pack + laser fixation ring & laser focusing ring

Upgrade your diode laser with high-quality laser lens pack

Endurance offers a full laser lens pack.
The accuracy of laser cutting and laser engraving depends on the laser lens quality.
The better lens – the better the result you will get.
A better lens means a better laser beam spot.

If the lens is made out of plastics or is defective then it will not be useful for laser cutting or laser engraving.
The engraving will be blurred and fuzzy.

Endurance offers a laser lens pack for laser makers and professionals.

There are 4 types of lenses that we are offering:
• Regular 3 element lens [installed by default] (black one)
• G2 lens (golden with a small lens)
• G7 lens (golden with a big lens and silicone ring)
• G8 lens (the black one with a longer tube)

All these lenses were designed by professional optics suppliers and tested in the Endurance laser lab.

Parameters

3 element laser lens

G2 laser lens

G7 laser lens

G8 laser lens

About the lens Standard 3 element laser lens Short focal G2 laser lens Multi focal G7 laser lens Long focal G8 lens.
G7 Aspheric Glass lens G8 Precision Glass Molding
Optimal focal range 30-100mm 5-30mm 20-100mm 30-100mm
Laser lens material glass glass glass glass
Size M9 x 0.5mm x 10 M9 x 0.5mm x 10 M9 x 0.5mm x 10 M9 x 0.5mm x 10
Wavelength 405-450nm 400nm-700nm broadband coated 400-700nm 400-700nm
AR coating + + + +
Transparency 70% 96% 85% 90%
Components 3 element lens Single Element Single Element Element Aspheric
Laser lens parameters FL: about 8mm Front Focus: 4.02mm EFL=8mm EFL: 8mm
Lens Size: 6mm Back Focus: 4.8mm Laser lens thickness=2.3mm NA: 0.20
Working Focus: 2.357mm NA=0.2
Naked Lens inside: 6.33mm(Diameter) CA=6.5
Divergence: 10.02mm BFL=5.67122
Divergence: 8.8mm
Focal Length: 7mm
Glass Type L-BAL35
Frame material Black metal Golden metal Golden metal Black metal
Laser power 100mW ~ 10W 100mW ~ 10W 100mW ~ 10W 100mW ~ 10W
The best tested focal range* 63-67 mm 32-33 mm 83-85 mm 70-75 mm
The smallest laser beam spot* 400 x 600 microns (uM) 300 x 600 microns (uM) 400 x 600 microns (uM) 350 x 600 microns (uM)

 

* – those measurements were made in Endurance laser lab.

Avoid cheap laser lenses that might look as expensive ones but they have wrong geometrics, design, materials and will not act as they should.
Bad lenses can even have a reflection that may damage the laser diode.

Briefly about a 3 element laser lens

A 3 element collimating lens w/ AR coating for 405nm – 465nm. It has M9/P0.5 threads that will work with a lot of standard diode housings available. This lens is good for correcting laser beams for long ranges.

Briefly about a G2 laser lens

This lens is the best choice for short ranges, as in an engraving machine. For long ranges please consider a 2 or 3 element lenses.

Briefly about a G7 laser lens

The G7 is a second-best high pass single lens but it won’t increase the beam divergence as the G2 does. The G7 has a long focal length just like a 3-elements lens. It’s a well-balanced lens that has the advantage of 3 element lens (very good divergence) and G2 (in terms of power).

Briefly about a G8 glass collimation lens.

Broadband AR Coating 400nm-700nm
This lens is a long focal length single element glass lens with a broadband AR coating. It has a 90% pass efficiency which is amazing for a longer focal length lens. It does an amazing job of cleaning up stray light around the projected spot with many common diodes caused by the small amounts of uncollimated light escaping the lasing cavity reflecting off things like the edge of the emitter, walls of the module or inner walls of the lens barrel. Like the G2 lens or countless other similar lenses being sold as G-2’s, it creates a reduced spot size while maintaining a 90% pass efficiency compared to the 96% pass efficiency of a G2 lens.

We tested the G8 lens for CNCs and 3D printers and got a very practical result.
However, the G2 lens makes the smallest spot with the aperture of the lens about 30mm-40mm. This is the smallest spot that can be made, with the high transition level and power density. The G7 & G8 laser lenses will be a great addition for your laser cutting with the advantage of having a longer focal length.

Independent test results by DTR’s laser shop

Conclusion

We suggest taking advantage of all 4 types of lenses.
1. You get a spare 3 element lens just in case it breaks.
2. You get 3 additional lenses that can be used for accurate and clean laser cutting & precise laser engraving when close attention to detail needed..
3. The G2 lens remains the best choice for laser cutting and laser engraving with the shortest focal range.

3-element lens (Cleanest beam profile, best for low power lasers)

3-element lens has a long focal length, low divergence, and clean beam profile but it has a significant output loss.
Advantage Tight laser beam with the cleanest beam profile
Downsides 70% efficiency (1W diode = 700mw using this lens)

G2 lens(best for power)

The G2 is a single lens enabling the maximum true power of the laser diode for rapid close-range burning and engraving.
Advantage 95% efficiency, reduces the beam aperture
Downsides Increase the beam divergence (thickness) and the beam profile

G7 lens(Balanced Multi-Purpose Perfection)

This lens is a cross between the divergence and the power lens. With the G7, the beam divergence won’t increase as it does with the G2 and you will still get very close power of the laser diode.
Advantage 88% efficiency, long focal length and increases beam aperture.

Keep in mind that a low-quality Chinese lens might have some optical artifacts and other issues that might have a poor effect on laser cutting and laser engraving.

Special offer for laser lens package

145$. 95$ including priority shipment world wide.

Bigger focusing ring + fixation ring

Dear Endurance customers… We have made a free improvement for you.
1. bigger brass focusing ring
2. aluminum fixation ring.
Laser fixation rings

Recently we have been told that springs to not keep the lens tight and they are quite loose. This improvement will allow you to focus the laser much easier and fix the lens as soon as you reach the focus.

Share a link to EnduranceLasers.com web site in your social media and we will send you these 2 rings for free!)
Hurry up, the offer is valid till 8-th of July 2019!
An Endurance laser lens pack + laser fixation ring & laser focusing ring

Order a laser lens pack today!

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Learn more about laser beam focusing

About different lens: laser beam spot, focal range.