Copyright SLP UK Ltd 2013. LED sources are a unique source of glare. The Diagram displays the most common fluorescent lighting source. Copyright SLP

Copyright SLP UK Ltd 2013

Nanoprism

A Breakthrough in Optical Control

What is Nanoprism??


• LED sources are a unique source of glare.

• The Diagram displays the most common fluorescent lighting source.

Glare

SLP UK Nanoprism Complete Control of LEDs



Glare

• This diagram displays a typical LED light source.


LEDs are nearly 600 times brighter than T5 lamps

18 W T8

14 W T5

Single LED Chip

Luminous area m2

0.046 0.027 0.00004

Lumen output 1450 1200 100

Surface Brightness Cd/m2

10,000 15,000 8,300,000

Glare



T8 P12 Type prismaticPrism size Circa 5mmEasily extruded15,000 prisms onA 2 ft. panel

T5 P42 Type MicroprismPrism size less than 2mmPractical limit for extrusion750,000 prisms on a 2 ft. panel

LED NanoprismPrism size 0.5 mmInjection moulded1,500,000 prisms on a 2 ft. panel

Glare Control Solutions



Nanoprism

Benefits of Nanoprism

Microprism

Complete Control of LED Brightness The LED Disappear



• Unique 2 surface design

• Nanoprism outer surface is a custom design moulded prism

• The rear surface is a special texture which acts in conjunction with the prisms




• High Efficiency• Rear surface texture minimises reflection• Rear surface texture maximises collection of “off axis” light rays• Injection moulded sharp minimum radius front Nanoprism maximisetransmission• Injection moulded flat faces to Nanoprism ensure minimum reflection• Precise relation between rear texture and front prisms minimises losses

Transmission over 89%!!!




measured under practical conditions as the difference in Lumen output between a practical luminaire without the panel and the same luminaire with the panel added

Precise Photometric control

Typical polar curve 600 x 600 RecessedModule 2200 lumen output




Nanoprism vs. Opal Same Scale


Elevationangle

70% Opalcd/kLm

Nanocd/kLm

Nano% lower

60 97.5 95.0 2.5

65 82.1 71.0 13.6

70 65.8 50.8 22.8

75 49.1 34.1 30.6

80 33.2 20.5 38.2

85 16.3 8.6 46.9

Meeting Luminance

Requirements


10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 200002000

2500

3000

3500

4000

4500

Nanoprism limiting luminance

Series1

Source Lumens/m2

Lum

inance c

d/m

2

From the graph above we can see that the limit for meeting 3000cd/m2 is 14200 Lumens per m2 input from the source. For a luminous area of 585 x585 mm this equates to 4800 Lumens input.

Nanoprism Practical application

To obscure source D ≥ S. In practice D minimum should not be less than 25 mm

Provided these guidelines are used the resultant photometry will be as publishedand the LED point sources will not be individually visible



The Effects - Office

1000

750

500

300

200

Illuminance [lx]



The Effects - OfficeGeneralCalculation algorithm used Average indirect fractionHeight of evaluation surface 0.75 mHeight of luminaire plane 2.73 mMaintenance factor 0.85Light flux factor (see maintenance plan) 1.00Total luminous flux of all lamps 110000 lmTotal power 1000.0 WTotal power per area (144.00 m²) 6.94 W/m² (1.33 W/m²/100lx)

Evaluation area 1 Reference plane 1.1

HorizontalEm 522 lxEmin 451 lxEmin/ Eav (Uo) 0.86UGR (7.9H 7.9H) <=19.3Position 0.75 m



1000

750

500

300

200

Illuminance [lx]



The Effects - Retail

The Effects - Retail GeneralCalculation algorithm used Average indirect fractionHeight of evaluation surface 0.75 mHeight of luminaire plane 6.00 mMaintenance factor 0.80Light flux factor (see maintenance plan) 1.00Total luminous flux of all lamps 125000 lmTotal power 1425.0 WTotal power per area (144.00 m²) 9.90 W/m² (1.83 W/m²/100lx)

Evaluation area 1 Reference plane 1.1

HorizontalEm 541 lxEmin 385 lxEmin/ Eav (Uo) 0.71UGR (2.5H 2.5H) <=18.3Position 0.75 m





The Effects – Potential Cost Savings • High efficiency means less luminaires needed

• High efficiency means lower power LEDs for the same effect

• Reduces CO2 emissions

• Harnesses the long life of LED technology to reduce maintenance and environmental impact

• 620 x 620 mm Flat sheet.• Can be cut to fit surface and recessed

modules for retail and commercial luminaires.

• Other sizes of flat sheet available.• Nanoprism can be custom moulded onto

new diffusers to control any LED Product.

Products

Application• Moulded bulkhead diffusers• Linear modules• Decorative bulkheads• Floodlights



Thank YouAny Questions?



Documents

Copyright SLP UK Ltd 2013. LED sources are a unique source of glare. The Diagram displays the most common fluorescent lighting source. Copyright SLP