Goniophotometer vs Spectrophotocolorimeter

The spectrophotocolorimeter will not give you polar plots unless it is connected to a goniometric device. Depending on how good the 'photometer' part of the goniophotometer is, you could get luminous flux, polar plots and CRI from it. You'd have to calculate efficacy from the lumens produced divided by the power consumption by the lamp; no photometric device (that I know of) can do that directly. If the photometer mounted on the goniometer is a Minolta CS-200 it should be able to provide the photometrics you need. If you need spectral plots, then some time of spectrophotometer would be needed. (Westboro Photonics, linked below, could supply that.)

http://www.konicaminolta.com/instruments/products/display/luminance-color-meters/cs200/index.html

In lieu of a goniometer, you might consider a conoscopic method for making polar measurements, since the measurement process is much, much faster:

http://www.eldim.fr/

http://www.radiantimaging.com/?q=products/spheres

(The last link could provide a goniomeric or a type of conoscope method to provide the polar plots you need, depending on the size of what you want to measure.)

According to LM-79, they recommend Goniophotometer and integrating sphere to do LED luminaires test. There is a full test report:

Goniophotometric System (B-β and C-γ test): http://www.lisungroup.com/product-id-241.html LM-79 recommend LSG-1800, advise C-γ test and IES file export

Spetrophotometer & Integrating Sphere Test System: http://www.lisungroup.com/product-id-198.html

Shoeb, are you setting up a lab, or trying to get us to tell you how to set a catalogue and then try to sell parts?

I've replied to your other post and now this one where you indicate you might be setting up a catalogue for something you barely understand.

could you please clarify?

The more I see of Shoeb's posts the more I'm convinced this is a flight of fancy.

I've got to admit I miss "Mearle" his imagination knew no bounds.

looking at the communities you've joined I conclude you are not from this field, thus youre suggestions will not be useful to me in fashion.

Did they add a fashion section to this engineering website? Great, whats next, red carpet count downs?

My question is answered, I've got the information I needed, this thread is closed. Thanks for all your ideas and knowledge.

IESNA-LM-79-08 Test Solution: Goniophotometer Postdate: 2011-04-28 Hits: 196

The U.S. Government issued her LED test standards IESNA-LM-79-08. This approved method is a guide developed for the measurement of Solid State Lighting (SSL) products such as LED Street Light, LED Flood Light, LED Down Light, LED Ceiling Light, LED Par Light, LED Tube, LED Module and so on. The most of LED fixtures manufactory use the Integrating Sphere to do the color and photo parameters test. But considering to the SSL's feature is not like a light source, it requests a goniophotometer to do the test. According to CIE121-1996, the following two goniophotometers are recommend:

1. LSG-1800 is a goniophotometer which rotates the luminaire around two mutually Perpendicular axes whose intersection is the photometric centre of the goniophotometer. This type of goniophotometer is normally used with a single photometer head positioned at an adequate distance from the centre

2. LSG-2000 is a goniophotometer in which the luminaire does not move at all. The photometer head rotates around two mutually perpendicular axes whose crossing is the photometric centre of the goniophotometer

The Goniophotometer LSG-1800 and LSG-2000 measured data match with international standard form (IES) and can be applied for lighting design by other lighting design software such as Dialux.

The test report shall list all significant data for each SSL product tested together with performance data. The report shall also list all pertinent data concerning conditions of testing, type of equipment, SSL products and reference standards. LISUN GROUP developed Goniophotometric System and Spectrophotometer & Integrating Sphere Test System to meet the request of Energy Star test standard.

About LISUN GROUP: it is lead in CFL and LED test instruments, main products are EMC Test System, Electronic Ballast Tester, Magnetic Material Analyzer, Spectrophotocolorimeter, Goniophotometer, Safety Tester for lighting fixtures, LED Testing and CFL test instruments.

Engineer Department
Email: Engineering@Lisungroup.com
Website: www.Lisungroup.com

IESNA-LM-79-08 Free Download (PDF 0.8MB)
The LISUN GROUP "Goniophotometer" Brochure (PDF 0.9 MB)
The LISUN GROUP "Spetrophotometer & Integrating Sphere Test System" Specification (PDF 0.55 MB)

You can download the LM-79 Test report at: http://www.lisungroup.com/product-id-241.html