Guidelines / Manual
BTS256-LED Tester / Page 11
BTS256-LED-150, -300 and –500 for Large Size LEDs
Version 01.2009-01
Picture 11.1: BTS256-LED-500 with UMBB-500 Sphere
Large size LEDs or LED arrays require larger size integrat-
ing spheres than the one built into the BTS256-LED tester.
For these applications the BTS256-LED tester can be or-
dered with larger diameter integrating spheres from 150mm
(6 in) with port diameter
≥
25mm (1 in), 300mm (12 in) with
port diameter
≥
50mm (2 in) and 500mm (20 in) with
≥
75mm (3 in) diameter. The add-on sphere and BTS256-
LED tester are calibrated together and therefore form one
inseparable unit.
The BTS256-LED tester mounts to the integrating sphere
with a UMPA-1.5-BTS256LED adapter on UMPF-1.5-HL
port frame out of Gigahertz-Optik’s unique modular UM in-
tegrating sphere family.
Gigahertz-Optik’s UM
*)
series integrating spheres and ac-
cessories (sphere components) offer one of the most exten-
sive integrating sphere system programs available.
Worldwide acceptance is due to its modular design concept
that allows the end-user to set-up the sphere according to
his own application specifications and budget requirements.
Each integrating sphere is built to order from a large stock
of standard components using an efficient cost effective
production process. Custom modifications of standard com-
ponents, custom design components and complete system
set-ups are offered.
*) the
U
lbrichtsche Kugel (Integrating Sphere) is named for
the designing engineer Richard Ulbricht (1849 to 1923). M
stands for
M
odular concept
For accurate measurements independent of the substitution
effect caused by the DUT blocking the measurement port
the use of an auxiliary lamp is needed. The auxiliary lamp
employs a high power halogen lamp to meet the required
flux levels. If a power supply with interface is available, e.g.
Gigahertz-Optik’s LPS-100, the substitution correction rou-
tine can be supported by the G.O.O.S. software.
Picture 11.2: UMPA-1.5-BTS256LED Bayonet Adapter
Picture 11.3: Fix by turn the BTS256-LED
Auxiliary Lamp
