Integrating Sphere

Phuc Gia® is an organization that provides information about the Integrating Sphere to individuals, organizations, and enterprises both domestically and internationally. This is important information for conducting LED testing and is directly relevant to businesses. Please refer to the article below as Phuc Gia® has compiled this information in the following article!

See more: Capacity Profile Of Phuc Gia Laboratory Corporation

1. Structure of the Integrating Sphere

The integrating sphere is composed of two hemispheres that can be easily opened and closed by rotating hinges. Inside the integrating sphere, a photodetector is installed to provide information about the luminous flux of the light source. Additionally, an optical window is installed to channel the light from the source into a UV-Vis spectrophotometer via a fiber optic system. This mechanism provides information about the spectral power distribution, color temperature, and CRI (Color Rendering Index) of the light source.

To measure the total luminous flux of a light source, many integrating devices with different variations have been developed, but only the sphere variation fundamentally ensures the integration of the luminous flux. This is because the illuminance received on a certain region of the sphere is independent of the relative position of that region. Using this principle, we can establish a relationship between the illuminance received through an exit port (window) and the total luminous flux from a light source, provided the exit window is shielded from direct illumination.

Where:

• Point Light Source (S)
• Integrating Sphere (Q)
• Photodetector (D)
• Meter (I)

2) Principle of Operation of the Integrating Sphere

Based on the principle of multiple reflections on a diffusely scattering coating (according to Lambert’s Cosine Law), the integrating sphere is used to measure the total luminous flux in all space emitted from a radiation source placed outside or inside the sphere.

In the integrating sphere photometer, the lamp system to be measured is placed near the center of the sphere. Baffles are arranged inside the integrating sphere so that the light from the lamp and the first reflected light do not directly illuminate the optical receiver (detector). The optical receiver used in photometric integrating spheres must have a spectral characteristic similar to the spectral sensitivity characteristic of the human eye and is covered by a translucent diffuser plate. Typically, the baffle is placed at a position 2/3 of the radius from the sphere center; its area should be as small as possible but large enough to block direct radiation and first reflections from entering the receiver, especially when the lamp system to be measured is large. First, the optical receiver signal must be calibrated using a standard luminous flux lamp. These lamps can be replaced interchangeably within the integrating sphere. Additionally, the integrating sphere usually contains an auxiliary lamp used to correct for discrepancies caused by lamp substitution (as the standard lamps and the tested lamps may have different self-absorption coefficients).

3) Operating the Luminous Flux Measurement using the Integrating Sphere

A photometric measurement device for lamp systems in public lighting using an integrating sphere consists of the following components:

• Integrating Sphere
• Standard Lamps
• Stabilized Power Supply: An unstepped regulated power supply is used to power the system’s operation.
• Receiver (Detector): Must match the visual response (human eye’s spectral sensitivity).
• Data Processing Computer and Display Device: All electrical and optical parameters of the lamp system are processed and displayed on the computer.

When measuring with an integrating sphere, the standard lamps used for luminous flux measurement are very expensive, making the cost per test measurement very high. Therefore, for measurements that are only for reference or testing purposes, it is not strictly necessary to use certified standard lamps; the laboratory’s own sample standard lamps can be used.

4) Measurement Procedure

• Mount the sample lamp onto the holder.
• Adjust the supply voltage to 220 V (taken through the stabilizer).
• Wait 15 – 20 minutes for the lamp to stabilize, then close the sphere.
• Record the measured photocurrent and luminous flux displayed on the computer.

WHAT MAKES THE PHUC GIA® BRAND:

Phuc Gia® – The Leading Unit Providing Customs Services:

The reasons why all enterprises choose Phuc Gia® as the leading unit in consulting for Food Safety Conformity Declaration and Food Safety Regulatory Compliance Declaration, Energy Labeling, Conformity Certification, Cosmetic Declaration, and Logistics Services:

Phuc Gia® has over 10 years of experience in the industry, and is the first unit with sufficient capability to provide Customs services to over 500 large and small organizations In & Out of Vietnam, including: Sharp (2012); Samsung (2012); Hitachi (2013); Electrolux (2013); Panasonic (2013); LG (2013); Sony (2013); Siemens (2013); Mitsubishi (2013); GE (2013); Haier (2014); Toshiba (2014); Carrier (2014); Philips (2014); HappyCook (2015); General (2015); TCL (2015); Alaska (2015); Casper (2015); Gree (2016); Hải Hà (2016); VinMart (2017)…

Phuc Gia® owns a professional Consultation Team and workflow process, capable of answering all enterprise inquiries, helping customers optimize time, mental effort, physical effort, and minimize risks during the process of goods transportation and customs clearance procedures.

Phuc Gia® is the first & only unit to publicly announce the Global Listed Price on its Website and provide free one-year insurance to customers in the event that State legal regulations change!

FREQUENTLY ASKED QUESTIONS:

Despite our services being in the high-price segment, why is Phuc Gia® still chosen by enterprises as the leading reliable unit for customs services?

• This is a concern shared by many customers before choosing Phuc Gia® as their Customs Services provider.
• Over the past 10 years, Phuc Gia® has served over 500 large and small Domestic and International Enterprises. More than 90% of the enterprises that have used Phuc Gia®’s Customs Services agree that the quality of the Service is commensurate with the money they invest.
• Customers comment that: “The price the Enterprise pays when using Phuc Gia®’s Customs Services is SIGNIFICANTLY MORE COST-EFFECTIVE compared to the time and expense the Enterprise would incur to independently complete tasks such as: self-arranging product testing; self-researching and preparing dossiers; self-working with relevant ministries and departments to finalize dossiers; self-obtaining Customs Clearance permits…”
• Phuc Gia® commits to optimizing your time, mental effort, physical effort, and money during the Customs Clearance process, as well as MINIMIZING RISKS during the licensing process!

For more details, please contact us at:
PHUC GIA LABORATORY CORPORATION
PHUC GIA CERTIFICATION CENTER
PHUC GIA INSPECTION TESTING CENTER

Address: ICD Long Bien, No. 01 Huynh Tan Phat, Sai Dong B Industrial Park, Long Bien Ward, Hanoi City, Vietnam.
Hotline: 0981 996 996/ 0982 996 696/ 024 7779 6696
E-mail: lab@phucgia.com.vn
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