What is a gonio spectrophotometer?

In this day and age, traditional photometry laboratories are no longer in operation. To achieve a complete characterization of LED-based luminaires, a new degree of complexity is required to measure their performance at different angle orientations. To measure brightness and evaluate the angle dependence of luminous intensity distribution, this instrument combines the capability of a goniophotometer with the characteristics of a spectroradiometer. The gonio spectrophotometer is explicitly designed for lighting producers that want to remain one step ahead of the competition and take control of their product development early in the process.

It provides excellent value. When comparing the cost of purchasing a system against the cost of shipping lights to an external lab, many businesses find that the payback time is shorter than five years—more frequent characterization results in superior goods that reach the market more quickly due to this practice.

According to the viewing and lighting angles, the color appearance of such materials may vary significantly. This gonio-spectrophotometric color measurement system may be used to determine the color of such materials by measuring the spatial distribution of reflected (or transmitted) light at user-selectable angles of illumination and detection, as well as the color of the material itself.

 

Designing with simplicity
The goniophotometer eliminates the need for highly trained personnel to provide accurate findings, thereby reducing costs. A new level of performance and usability is achieved via simple-to-use software, exact alignment standards, and significant automation possibilities.

The output of photometric files with a single click
Even though this gonio spectrophotometer can produce spectrum and color data from any angle, it stays faithful to its core function – producing IES/LDT output files as quickly and efficiently as possible.

Special LED measuring requirements
The measurement of LEDs is linked to the photometric data such as the light distribution curves or the overall luminous flux calculation.

The proper power supply conditions and electrical quantity measurements must be ensured for the full features of LED goods. With such an extensive measurement method in a complete measuring system, it is thus essential considering a programmed and stable laboratory power supply. In addition, the need for ambient temperature measurement may be met by adding temperature recording sensors in the system, and LISUN provides the best measurement equipment.

All of this may be controlled via an optical, electrical, and temperature monitoring interface. This facilitates the provision of adequate working conditions and the preparation of comprehensive measures in compliance with the current international standard recommendations. Modern goniometric systems utilize spectroradiometers, contrary to conventional goniophotometers, to measure absolute photometric values and for colorimetric measurement at the same time.

Further functionalities
Time is the most frequent issue in photometric labs with a high number of luminaires. New gonio spectrophotometer designs may permit so-called on-fly measurements, i.e., without halting the gonio spectrophotometer once the arm is adjusted to a certain angle. In this variation, the luminaire is rotated uniformly in a particular location (plane), and a large number of measurements are collected from the whole range using the rapid measuring system. The computer software allocates the measured value to the predefined measurement step grid thanks to signals from the encoder. This needs a quick method of measurement.

It is recommended to attach extra slides (rails) to smoothly adjust the tripod with the measuring head along the measurement axis to make optimum use of the laboratory area and convenience. The measurement distance may be decreased for small items with a bit of flow without setting the measuring axis.

It is not required and is not customary to calibrate the whole goniometric apparatus, and the measurement equipment must be calibrated if a spectroradiometer or photometer is employed. The manufacturer shall offer an official laboratory calibration certificate or, if asked, by the client.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Surge Generator, EMC Test System, ESD Simulator, EMI Test Receiver, Electrical Safety Tester, Integrating Sphere, Temperature Chamber, Salt Spray Test, Environmental Test Chamber, LED Test Instruments, CFL Test Instruments, Spectroradiometer, Waterproof Test Equipment, Plug and Switch Testing, AC and DC Power Supply.

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