Analysis of Diffuser Panel and Reflector of LED Light Bulb

Low electricity consuming LED light bulbs are drawing attention because of its high energy-saving effect.  A diffuser panel to reduce the intense light from the light source and a reflector for the efficient use of light are used for a LED light bulb.

In this note, the UH4150 installed with a transmission holder (close contact), which allows the measurement the light including the diffused light, and a diameter 60mm full integrating sphere was used to measure the transmission spectrum of the diffuser panel in a LED light bulb.  The reflectance spectrum of the reflector of the LED light bulb was also measured by using the micro total reflectance measurement system (special order), which allows the measurement even for the micro size of about diameter 5mm. 

Transmission Spectrum Measurement for LED Light Bulb Diffuser Panel LED

Analysis Condition

Instrument: Model UH4150 Spectrophotometer

Measurement wavelength range: 300~800nm

Scan speed: 300nm/min

Slit: 8nm

Sampling interval: 1nm

Accessory:

·         Dia. 60 full-sphere integrating sphere accesory

·         Transmittance holder (close contact)

Transmission Spectrum

Analysis Image

Total Reflectance Spectrum Measurement of LED Light Bulb Reflector

Analytical Conditions

Instrument: Model UH4150 Spectrophotometer

Measurement wavelength range: 300~800nm

Scan speed: 300nm/min

Slit: 8nm

Sampling interval: 1nm

Standard reflective material: Aluminum plane mirror

Accessory

·         Dia. 60 Standard Integrating Sphere (for total reflectance)

·         Micro Total Reflector Measurement System (special order)

Reflectance Spectrum

For more information on Hitachi UV-VIS-NIR, please visit Hitachi High-Tech Science website

https://www.hitachi-hightech.com/global/products/science/ai/

UH4150 Product Information

http://hk.techcomp.com.hk/EN/product/content/?MenuID=22&ContentID=1530&CID=221

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