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There are trade-offs involved with selecting any of the technologies available for laser safety eyewear. Filterglass will be heavier than polymer products, but usually provides better visible light transmission (VLT). Coatedsubstrates are selected when multiple wavelength protection is required, but these products tend to be amongthe most expensive and require the most care. The physical properties of polycarbonate make those productssuitable for all-day wearing and for molding single lens products with wide fields of view.

Finally, consider the work environment. High VLT products are best for low-light environments. Impact resistance is necessary in production environments and should be considered in all environments. UV protectionor glare reduction may be needed for welding. Larger products and wrapping products provide additional splashprotection for medical applications.

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Understanding Your Laser Protective Eyewear Needs

Selecting Laser Safety Eyewear

Match Wavelength Ranges:

Determine Optical Density (OD):

1

2

3

At Kentek, we know that no two faces are alike, so we can help make your eyewear choice as easy as possible by offering the widest selection of frames and filters.

What is a laser filter designed to do?

A laser emits radiation at a specific wavelength, or simultaneously at several wavelengths, which may or may not be within the normal visible spectrum. A laser filter must protect the eyes from a particular set of wavelengths, but at the same time allow some “normal” light to pass through to the eyes. One filter alone cannot block all wavelengths and still allow the user to see his work.

There are two basic types of laser protection filter technologies: Absorption and Reflection

ABSORPTIONIn absorption, the energy of the laser is captured by the protective medium and transformed into heat, which

must then be dissipated by the surrounding materials.

Filter Glass- The traditional material to effect absorption of laser radiation for eye safety is filter glass or mineralglass. The products are sometimes referred to by the colors of the final glass product – for example, blue glass.Each filter contains an element or mix of elements that is known to absorb laser energy at particular wavelengths.Glass filters generally provide superior thermal stability when compared to plastic filters and polycarbonate.Under high heat, however, glass will tend to splinter or shatter due to heat distortion. Glass filters should be treated or coated to hold the pieces together in the event of catastrophic failure.

Polymers- Polymers impregnated with dyes and other materials reproduce the absorptive behavior of mineralglass laser filters. The polymers used in laser safety are typically polycarbonates, but other materials, includingnylons and acrylics, may be used.

REFLECTIONReflection means that laser radiation directed at the filter bounces off in a different direction, often in a broad,

scattering pattern. Reflective laser safety coatings are known as thin film coatings, metallic film coatings, dielectric films and dielectric interference coatings. Multiple layers of specially selected materials are applied toa substrate under vacuum conditions. A custom designed interference pattern is created to reflect only thedesired wavelengths and allow remaining light to pass through.

Choose eyewear that is marked to cover the entire wavelength range(s) but keep in mind when working with a wide variety of wavelengths, it might not be possible to cover them all with one filter.Call KENTEK for further options if you cannot locate a filter that will cover your entire wavelength range.

Select a frame style that meets individual needs. Consider whether users will need a frame option thatfits over prescription glasses, or perhaps an adjustable frame to accommodate a variety of faces.

Optical Density is the protection factor provided by a filter. Each unit of OD represents a 10X increasein protection. Select a filter that is equal to, or greater than, the OD that you need. The formula for calculating OD is: Dλ = log10 (Hp/MPE) = –log10τ λ

For assistance in determining the recommended OD for your laser:a) Refer to your laser manual for a listed OD minimumb) Call your laser manufacturer for their recommendationc) Allow KENTEK to calculate your OD

Note: The symbol CE designates products meeting the European Directives for laser eyewear.Look for this symbol for products meeting the European Directives EN207, EN208 and/or EN60825-1

Helpful Hint:The laser types listed in this catalog are for reference only.The wavelength range(s) and OD factors are the mostimportant factors in selecting eyewear.

Helpful Hint:Consider Visible Light Transmission (VLT) values whennarrowing down eyewear selections. VLT is the amount ofvisible light that passes through a filter and is usable to theeye. Typically, the higher the VLT percentage the lighter thecolor of the filter.

NEED HELP?????CONTACT THE PROFESSIONALS

With so many eyewear options available selecting eyewear can be overwhelming.

Contact one of our Account Specialists for immediate help in selecting the best eyewear

for your application and needs.

Select Frame Style:

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Color Recognition

Filter Material Selection

EXAMPLE: 20C

Primary color Color recognition RESULT:

Red = r unrecognizabler

Yellow = y • minimal y ••g •••

Green = g •• moderate b •••

Blue = b ••• best choice

Multiple wavelengthcoverage?

High Power Protection(100W/cm2 or greater)?

Femtosecond (modelocked) coverage?

Wide field of view?

8-hour shift wear?

Visitor eyewear?

Prescription (Rx)?

Z87 Impact Resistant?

Good Choice: usuallyrequires a Fit Over Frame or adaptor

Best choice: All Kentek Laser Protective Eyewear is ANSI Z87 impact compliant

Selective far IR wavelength coverage(1064nm, 1540nm)?

Poly

A few good choices available One size fits alle.g. lab visitors

Wear prescriptionglasses

Flat or small nose bridge

Oval facial type

Long narrowfacial type

Wide facial type

Children or infants

Fit Over Spectacle

Fit Over Spectacleor

Rx Insertor

Rx Laser Eyewear

Saddle nose bridge or high apex nose bridge

Any frame style

Small to medium frame

Larger front and generally longer temples

Smaller frame styles

KXL, KBS, KWL

KXL, KBS, KOL, KOS, KWL

KRX, KCM

Download our Rx brochure.

KRX, KBS

All frames

KMT, KXP

KXL, KBS, KWL, KOL

KJJ, KJI, KJC Download our Children's frame brochure.

• Secure, stable fit to ensure eyewear stays in place.

• Comfortable fit to ensure that eyewear is worn when needed.

• Close fit to ensure maximum reduction of orbital and peripherallight.

Tips for proper fit:

-frame should fit close to face

-frame should be supported by bridge of nose

-temples should extend comfortably over the ears

-avoid metal frames when electrical hazards are present

Characteristics Frame Type Frame Choice What To Look ForFilter Needs

This filter would not be a goodchoice if you need to see redcapillaries.

It would be a good choice ifyou need to see blue veins.

Always make sure your LSO approves your eyewear selection.

Frame Fitting

Best Choice - Product selectioncurrently limited

Best Choice - Technologicallyfeasible, limited selection.

Best Choice - Technologicallyfeasible, limited selection.

Not available at present, testing in process

Larger lens, often too heavy

Excellent VLT and impact resistant

Good Choice with Fit Over frame for multiple lasers in use

Good Choice with Fit Over frame

Multiwave

Best Choice

Best Choice

Best Choice

Larger lens, often too heavy

Excellent VLT and impactresistant

Good Choice with Fit Over frame for multiple lasers in use

Good Choice, Rx may be in laser lens

Glass

Very good for standardwavelength combinations

May not be possibledepending on wavelength

Good Choice

May not be possibledepending on wavelength

Some new products emerging

Best Choice

Good Choice with Fit Over frame for multiple lasers in use

Actual frame dimensions shown under frame styles on pages 5-7Color recognition is a subjective response. This scale is designed to give you a sense of what is visible.

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SCALE LEGEND

FRAME STYLES

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FRAME STYLES

Large spectacle with adjustable wire coretemples fits over Rx glasses.

KXL

Lens: “A” Width 60mm, “B” Height 47mmBridge: 18mm • Inside Front: 140mm

Temple: 145mm

Lens: “A” Width 70mm, “B” Height 38mmBridge: 17mm • Inside Front: 130mm

Temple: 134mm

(KRX-RxINSERT)KRX

Medium fit-over spectacle; ideal for Visitoruse. Exceptional visibility and sturdy construction.

KVR

Lens: “A” Width 128mm, “B” Height 50mmBridge: 17mm • Inside Front: 130mm

Temple: 130mm

Large viewing area with lens front tilt andadjustable temple length. Universal fit for allfacial types.

KBS

Goggle converts to wraparound spectaclewith foam comfort pads. Interchangeablestrap and temples.

KST

Lens: “A” Width 60mm, “B” Height 34mmBridge: 18mm • Inside Front: 128mm

Temple: Interchangeable strap and temple

Goggle fit-over features a soft elastomercomfort fit with a wide viewing lens and fitsover most Rx glasses.

KPG

Lens: “A” Width 203mm, “B” Height 72mmBridge: 25mm • Inside Front: 155mm

Temple: N/A

Child size wraparound spectacle for ages 3-8 years.

KJC Infant size wraparound spectacle for ages 0-3 years with reversible frame and detachable head band.

KJI

Lens: “A” Width 42mm, “B” Height 30mmBridge: 15mm • Inside Front: 94mm

Temple: 92mm

Sleek wrapping spectacle with ratcheting,adjustable length temples and lens front tilt.

KRA

Lens: “A” Width 64mm, “B” Height 38mmBridge: 18mm • Inside Front: 134mm

Temple: 120-134mm

Frames Meet ANSI Z136.1 and Z87.1-2003 (Z87)

Soft goggle fits over Rx glasses with vents toavoid fogging.

KSGG

Lens: “A” Width 139mm, “B” Height 60mmBridge: 18mm • Inside Front: 152mm

Temple: N/A

Wraparound style with ratcheting,adjustable length temples, fits over Rx glasses.

KWR

Lens: “A” Width 133mm, “B” Height 57mmBridge: 18mm • Inside Front: 138mm

Temple: 125-140mm

Petite spectacle with adjustable wire coretemples.

KXP

Lens: “A” Width 56mm, “B” Height 37mm Bridge: 17mm • Inside Front: 127mm

Temple: 126mm

Wraparound style fit-over spectacle withadjustable length temples and bright colored frame.

KYM

Lens: “A” Width 126mm, “B” Height 47mmBridge: 18mm • Inside Front: 136mm

Temple: 120-130mm

Fits over Rx glasses, features side shields,adjustable length temples.

KOL

Lens: “A” Width 64mm, “B” Height 45mmBridge: 17mm • Inside Front: 143mm

Temple: 140-150mm

Wraparound style with ratcheting,adjustable length temples, fits over Rx glasses.

KWL

Lens: “A” Width 160mm, “B” Height 64mmBridge: 18mm • Inside Front: 155mm

Temple: 124-140mm

Fits over most Rx glasses, features side filters, adjustable length temples.

KOS

Lens: “A” Width 62mm, “B” Height 46mmBridge: 17mm • Inside Front: 139mm

Temple: 140-165mm

Steel frame with black side shields and saddle nose bridge

KAV

Lens: “A” Width 60mm, “B” Height 40mmBridge: 15mm • Inside Front: 139mm

Temple: 125mm

Lens: “A” Width 59mm, “B” Height 45mmBridge: 18mm • Inside Front: 127mm

Temple: 120-130mm

Sleek frame, extra comfortable. Available in red or black.

KHE

Lens: “A” Width 59mm, “B” Height 32mmBridge: 18mm • Inside Front: 124mm

Temple: 129mm

Goggle fit-over with foam comfort pads andelastic strap. Ideal for smaller faces and Rxlenses.

KGOG

Lens: “A” Width 63mm, “B” Height 40mmBridge: 18mm • Inside Front: 153mm

Temple: N/A

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Lens: “A” Width 54mm, “B” Height 32mmBridge: 16mm • Inside Front: 109mm

Temple: 98mm

Lens: “A” Width 60mm, “B” Height 46mmBridge: 18mm • Inside Front: 134mm

Temple: 125-130mm

Adjustable nose bridge and flexible, grippingtemple ends. Optional clip-in Rx insert.

Flexible temples, soft nose bridge and clip-in Rx insert.

KCM

Kentek’s laser protective face shield isdesigned to maximize face and eye protection for jobs that require more coverage than glasses or goggles can offer.Constructed of black durable nylon, the faceshield features an adjustable head strap andratchet adjustable nape strap for custom fit.Pivoting action allows user to lift shieldwhile wearing.

FSD

Lens: “A” width 254mm, “B” Height 203mmHead diameter: 162mm-215mm

Temple: N/A

Junior size spectacle for ages 6-10 years.

KJJ

Lens: “A” Width 48mm, “B” Height 28mmBridge: 17mm • Inside Front: 110mm

Temple: 100mm

Popular

Choice

Goggle with comfort pads fits over most Rxglasses.

KGG

Lens: “A” Width 69mm, “B” Height 56mmBridge: 18mm • Inside Front: 160mm

Temple: N/A

Popular

Choice

Large lightweight spectacle with soft nosepiece for comfort and grip.

KMAX

Lens: “A” Width 51mm, “B” Height 31mmBridge: 19mm • Inside Front: 125mm

Temple: 130mm

Sleek, wrapping spectacle with foampadding for maximum comfort and lightblocking fit.

KRZ

Lens: “A” Width 63mm, “B” Height 36mmBridge: 19mm • Inside Front: 141mm

Temple: 123-135mm

Large

IPL

Medium

XLarge

Small

Poly

Prescription

SELECTION KEY

X-RAY

Universal Fit

Filter Material Fit

Capability

Glass

Multiwave

Universal fit spectacle, wide side templesand excellent orbital and panascopicprotection.

KMT

Lens: “A” Width 55mm, “B” Height 55mmBridge: 18mm • Inside Front: 120mm

Temple: 125mm

Popular

Choice