Glass Optics for UVC LED Applications

Brian Jasenak

Kopp Glass, Pittsburgh, PA

IUVA 2018

February 27, 2018CONFIDENTIAL

UVC Applications

• How do UVC LEDs fit into current applications?

2018 © Kopp Glass Glass Optics for UVC LED Applications 2

Analytical Instruments

Laboratory Testing

Phototherapy UV CuringCounterfeit Detection

Water & Air Purification

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Traditional Technology

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Quartz Sleeves and Tubes

Traditional Lamps

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Enabling Technology: Breaking the Mold

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Molded Glass Optics

UVC LEDs

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Moldable Glass

#1 #2

CTE (E-7/°C) 81 34

Temperature Resistance350°C660°F

450°C840°F

Thickness Range0.100-10“

2.5-250mm0.100-5“

2.5-125mm

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0

10

20

30

40

50

60

70

80

90

100

200 250 300 350 400

Tran

smis

sio

n (

%)

Wavelength (nm)

Spectral Transmission

UVC Composition #1 0.15"

UVC Composition #2 0.15"CONFIDENTIAL

What are the possibilities?

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Molded Optic Design

LED Selection

Fixture DesignArray

Configuration

UV LED and Optics promote:

• Design flexibility• Optimized solutions• Efficient design solutions

Today, we will look at unique ways to use UV LEDs and optics.

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SIMULATION #1CIRCULAR SURFACE

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Case Study

Desired Performance:

• Homogenous exposure to UV energy

Target Area:

• 60 mm diameter, circular area

Applications:

• Laboratory testing

• Sample exposure

• Dish or equipment disinfection

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Optical System

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150 mm

265 nm15° Beam

60 mm

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Molded Glass Optic

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LED

Optic

3 different freeform curvatures not

defined by functions or radii

60 mm

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Results (10 million rays)

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LEDLED with

Optic

Efficiency (F/EF) 87.1% 83.9%

Average Flux 43.1% 85.2%

Uniformity (%90) 21.6% 88.3%

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SIMULATION #2SQUARE SURFACE

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Case Study

Desired Performance:• Homogenous exposure to UV energy

Target Area: • 100 x 100 mm area

Applications:• Laboratory testing

• Sample exposure

• Item disinfection

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Optical System

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45 mm265 nm

120° Beam

100 mm

25 mm pitch

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Molded Glass Optic

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Optic

2 freeform surfacesTIR surfaces

LED

Optic

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Results (8 million rays)

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LEDLED with

Optic

Efficiency (F/EF) 39.2% 61.8%

Average Flux 70.4% 76.3%

Uniformity (%90) 45.5% 80.9%

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Molded Glass Optic

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Optimize Your Device with the Latest Technology

18Glass Optics for UVC LED Applications2018 © Kopp Glass

Light control for improved testing and application results:

• Significant gains in uniformity• Increased flux on target surface• Increased fixture efficiency

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Thank You!

Brian Jasenak

bjasenak@koppglass.com

Kopp Glass, Pittsburgh, PA

2018 © Kopp Glass

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