TECHNICAL DEPT.
Lenses Test Report
www.khatod.com technical@khatod.com Page 1
01/07/2008
Via Monfalcone 41
20092 Cinisello Balsamo (Milano) – Italy
Tel. +39 0266013695 – Fax +39 0266013500
MODEL NO: PLJT50 - PLJT51
SUBJECT: LED 1-3-5W – Lens-diffuser Coupling - Output Luminous Intensity Measurement
PLJT50 - PLJT51
• High diffusion
• No vibration problems
• Color: White Milk
Typical applications are
• Architectural lighting
• Step-marker
• Signalling
• All the applications where power
diffused lighting signalling is
requested.
DESCRIPTION:
Verification of Luminous Intensity in coupling conditions between Khatod lenses and 1W White LEDs.
REPORT:
PLJT50 - PLJT51 is a special lens whose visual capacity achieves 170° on horizontal plane by creating a side view effect.
PLJT50 - PLJT51 diffuses the Power LED light as a real diffuser and not as a simple dot of light. The lens gives the light a full
side view effect with a great light uniformity.
The following measurements have been takes by using a standard white power LEDs at 0,5 m - 1 m - 2 m distance.
MEASURED DATA:
Column 1 shows p/n of the Lenses, column 2 shows Luminous Intensity detected measuring LEDs without lens, column 3 shows
Luminous Intensity detected on LEDs coupled with lens, column 4 shows the difference (X*) between col. 2 and col. 3
Lens Diffuser PLJT50 - PLJT51 Lux from 0,5 Mt
(ftc from 0,5 Mt)
Lux from 1 Mt
(ftc from 1 Mt)
Lux from 2 Mt
(ftc from 2 Mt)
Lux (ftc) 42,6 (3,93 ftc) 10,5 (0,97 ftc) 2,7 (0,25 ftc)
Test carried out after 5 min. of operation of the LED to 350 mA ~ , local power source GOSSEN KONSTANTER mod 3226-K118
Measurements carried out with Luxometer mod LUX-1337 of ISO-TEC and MINOLTA mod LS – 150
* X is the value of the measurement of the LED brightness at 1 meter distance, without optic devices applied to the LED.
TECHNICAL DEPT.
Lenses Test Report
www.khatod.com technical@khatod.com Page 2
01/07/2008
Test conditions:
Test current: 350 mA / LED
Room Luminous Intensity :0 Lumen
Room Temperature: 33° C
LED temperature after 10 min. : ~ 49 °C
The diagram shows the performance of Khatod lenses
Spectrum Distribution
45
25
5
0 Lux
0°
10° 20°
2,7 Lux
at 2 Meters
42,6 Lux
at 0,5 Meter
30°
30° Viewing
Floor
Height
40°
50°
60°
70°
80°
90°
100°
110°
120°
130°
140°
150°
160°
170°
180°
190°
200°
210°
220°
230°
240°
250°
260°
270°
280°
290°
300°
310°
320°
330°
340° 350°
2 Meters 1 Meter 0,5 Meter
10,5 Lux
at 1 Meters
PLJT50 PLJT51
Some photos
Differeces between PLJT50 -PLJT51:
TECHNICAL DEPT.
Lenses Test Report
www.khatod.com technical@khatod.com Page 3
01/07/2008
Drawing.
TECHNICAL DEPT.
Lenses Test Report
www.khatod.com technical@khatod.com Page 4
01/07/2008
Drawing.
TECHNICAL DEPT.
Lenses Test Report
www.khatod.com technical@khatod.com Page 5
01/07/2008
Lens characteristics
Parameter Symbol Rating Unit
Lens Material PC -- --
Holder Material -- -- --
Operating Temperature Topr -40 to +120 °C
Storage Temperature Tstg -40 to +120 °C
Average transmittance in visible spectrum (400 – 700nm) >90% as measured by using 3mm thick Optical Grade PC
LED characteristics
•Value is valid for any 1-3-5W lambertian LED.
Please note that flow lines and weld lines on the external surfaces of the lenses are acceptable if the optical performance of the
lens is within the specification described in the section “OPTICAL CHARACTERISTICS”
– Should you require further information, please contact Khatod for advice.
– All lens testing must be subject to identical conditions as Khatod test condition.
– Published by Khatod optoelectronic srl - All the data contained in this document are the proprety of Khatod optoelectronic srl
and may change without notice.
• DO NOT HANDLE OR INSTALL LENSES WITHOUT WEARING GLOVES, SKIN OILS MAY DAMAGE LENS OR LIGHT
TRANSMISSION
• CLEAN LENSES WITH MILD SOAP AND WATER AND A SOFT CLOTH
• DO NOT USE ANY COMMERCIAL CLEANING SOLVENTS ON THE LENSES
Khatod SRL, Milan, Italy, manufactures lenses for LEDs. Any other use of the lens shall void our liability and warranty. The lenses are an inert component to be
used in the manufacture of various products. Our warranty and liability are limited only to the manufacture of the lens. You may not modify, copy, distribute
reproduce, license or alter the lens and related materials of Khatod SRL. Khatod SRL does not warrant against damages or defects arising out of the use or
misuse of the products; against defects or damage arising from improper installation, or against defects in the product or in its components. No warranty of
any kind, expressed or implied, is made regarding the safety of the products. The entire risk as to the quality or performance of the product is with the buyer.
In no event shall Khatod SRL or Khatod USA be liable for any direct, indirect, punitive, incidental, special, consequential damages, or any damages whatsoever
arising out of or connected with the use or misuse of the product. Khatod SRL shall not have any obligation with respect to the product or any part thereof, whether
based on contract, tort, strict liability or otherwise. Buyer assumes all risks and liability from use of the product. The laws of Milan, Italy govern this product warranty
and liability and you hereby consent to the exclusive jurisdiction and venue of courts in Milan, Italy in all disputes arising out of or relating to the use of this product.
KHATOD LENS Use And Maintenance
Notes:
