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Description
20mm Focal Focus Lens by American Photonics for Up To 200W Laser Engraver CutterAdvanced Specifications: Anti reflective coated lens for <200W. Type: Meniscus Laser Focal Lens Material: Znse Laser Grade(made in the USA) Coating: 10. 6um (AR Both Side) 20mm Diameter 2mm Edge Thickness Diameter Tolerance: +0 0. 13mm Center Thickness Tolerance: 0. 1mm Focal Length Tolerance: < 1% Clear Aperture: >= 90% Diameter Scratch Dig: 40 20 Cutting Edge Features: OMTECH TESTED: Each American Photonics focal lens is tested on OMTech machines
Advanced Specifications:
- Anti-reflective coated lens for <200W.
- Type: Meniscus Laser Focal Lens
- Material: Znse Laser Grade(made in the USA)
- Coating: 10.6um (AR Both Side)
- 20mm Diameter
- 2mm Edge Thickness
- Diameter Tolerance: +0/-0.13mm
- Center Thickness Tolerance: ± 0.1mm
- Focal Length Tolerance: < 1%
- Clear Aperture: >= 90% Diameter
- Scratch/Dig: 40-20
Cutting Edge Features:
- OMTECH TESTED: Each American Photonics focal lens is tested on OMTech machines and approved by our laser specialists.
- QUALITY ZINC SELENIDE: Manufactured with premium zinc selenium via chemical vapor deposition for superior light transmission and heat tolerance.
- EXACTING LENS DIMENSIONS: Each lens is engineered and built with only a 0.003mm margin for error to ensure finer laser focus on high-resolution engravings and enable sharper cutting abilities.
- ULTRA-PURE MANUFACTURING: American Photonics utilizes an ultra-clean production room to ensure every focal lens is free from all impurities, reducing heat damage and ensuring extremely consistent laser beam transmission.
- HANDMADE IN THE USA: Each American Photonics focal lens is cored, polished, edged, coated, and packaged by hand with expert precision in each step.
- EXTREME HEAT TOLERANCE: Crafted to resist heat damage, cracking, and staining. A melting point of 2777°F (1525°C) easily withstands the thermal demands of CO2 laser applications.
- SUPERIOR LIGHT TRANSMITTANCE: Both sides are carefully coated with a strongly anti-reflective finish optimized for infrared light at a wavelength of 10.6 microns.
- LASTING DURABILITY: Our laser engraver focus lenses' double-sided coating process ensures outstanding scratch resistance for longer service life.
- WIDE COMPATIBILITY: This laser focus lens is designed to work with all CO2 laser engravers below 200W. Please check the focal lens diameter in your machine’s manual before purchasing.
Summary:
As you engrave, debris such as smoke and dust land on your focal lens, building up a layer of residue over time that absorbs laser beam power and can stain the lens permanently. Eventually, this lost power will affect your machine’s precision and throw off your laser settings. To keep your device running at its full potential, we recommend inspecting and cleaning the optics system once a week and replacing the mirrors or focal lens as soon they get damaged.
How to Select the Proper Focal Length:
A lens with a shorter focal length (1.5"–2.5") has a smaller focal point to provide sharper details for high-resolution images. A longer focal length (usually up to 4") has a larger focal point and extended depth of focus (or focus tolerance) which is better suited for cutting applications. Also, keep in mind that using longer focal lengths subtract from your workbed’s Z-depth.
Warranty:
- American Photonics provides a 30-Day 100% Guarantee
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Great Overview of the Art of Storytelling
Format: Audiobook
I chanced on this as an Audible "freebie" to keep on the list for when I was out of credits. Well, it's excellent, and well worth the listen. And excellent survey of the topic spanning topics of performance (preparing, voice, body language, projection), various aspects of framing (culture, age, ethnicity, audience size), story structure and so on
This point is for Hannah B. Harvey, if perchance she reads tese reviews. One point of modern storytelling and writing that is not brought out in your lectures, is that some of the best villain/antagonists are actually the heroes/protagonists of their own stories. This is tangentially alluded to in talking about story viewpoints, but not to the extent that it can be an entirely new story, as Wicked and Maleificent turned The Wizard of Oz and Sleeping Beauty on their heads. And even in the 1960's, many a Bond 007 villain was trying to create what they imagined to be a better world. It's useful to consider in storytelling, as far too many people have forgotten/fail to see the fundamental moral ambiguities of life, and I suspect that goes a long way to explaining the extreme partisanship we see in the world today.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 17, 2023
★★★★★ 3
Sadly, I found the tips and the examples in this lecture to be very simplistic and uninspiring.
Format: Audiobook
I expected a professional storyteller to be able to keep my interest but I found the presentation to be quite boring. I got nothing out of it that I didn’t already know from just being an avid reader. It felt like a high school lecture. Sigh!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 15, 2019
★★★★★ 5
Great course on how to improve your storytelling abilities
Format: Audiobook
Storytelling is a great way to get a point across, and most of us digest information through stories. But when it comes time to tell a story, most of us don't have the skills to make the story engaging or impactful. That's where this course on storytelling comes in. You'll get good pointers on vocabulary, body language, tone, along with deeper pointers about how to shape the view of the story and how to refine its characters. It's all very detailed but it's all very interesting and well worth it. This course will help you see how useful storytelling can be in your personal and professional life, especially if you're in a field where you have to do a lot of public speaking.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 21, 2021
★★★★★ 5
Excellent book!
Format: Audiobook
Excellent book!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2019
★★★★★ 5
This book will make a difference in your presentation.
Format: Paperback
If you rely on Powerpoint-like presentation in your work, get Cliff Atkinson's Beyond Bullet Points. I had determined that improving my company's presentations had potentially very high returns so I started poking around the net and Amazon for resources to help. At first, I struck out with books that were supposed to improve presentations, but ended up being guides on technically how to use Powerpoint. That was NOT what I was looking for.
Beyond Bullet Points is very different. It is a philosophy about creating presentations whose purpose is to communicate a story, not dump information. Frankly, it was not intuitive for me so I had to decide to just trust that it would work. When I was about ¾ finished, I started to really "feel" what I was doing. And, to my surprise, the most unlikely people really liked the result.
In a world where most business and how-to books are nothing more that restating what you already know (or, what you know isn't true), this one is an exception. I highly recommend it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 19, 2005
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