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Photometry to determine material properties Material properties is a general term used to refer to the reflection, transmission and absorption properties of a material. Photometry hereby refers to a measurement process through which these properties are determined using a photometer. 

Integrating sphere photometer 

The integrating sphere is very common in both broadband and narrow-band photometric applications for diffuse sample illumination and determination of the reflected and transmitted light proportions. 

UPB-150-ART precision integrating sphere 

With the 150mm diameter, the UPB-150-ART provides a good compromise in terms of precision of the sphere function and level of the measurement signal. Its manufacture from an aluminum block ensures a very precise alignment of the measurement ports to each other. Another characteristic property are the thin circumferential knife-edges of the measurement ports that enable a high acceptance angle for diffuse light. 

Multifunctional integrating sphere 

The UPB-150-ART is ideal for multiple functions through its five knife-edged measurement ports that can be used either while open or closed. Possible measurement setups include:

  • 0°/d Reflection
  • 8°/d reflection with and without glamour
  • 0°/d directed and diffuse transmission
  • Measurements with correction of sample absorption effects
  • Two-ray measurement setups
  • Luminous flux measurements

Accessories for individual sphere assemblies

Port plugs and port reducers that can easily be fixed and removed using the Slide & Fix holder are offered for either closure or reduction of ports. An important feature of the UPB-150-ART is that the front side of the plugs and reducers projects into the port and is therefore on the same level as the sphere surface. 

Universal sample holder 

The sample holder is fixed onto the posts of the Slide & Fix holder and ensures secure mounting of thin and thick samples. An important feature of the Slide & Fix system is that the sample holder can be combined with port reducers and a light trap. 

Light trap with Slide & Fix holder

The light trap has a 30mm input port and ensures minimal back reflection over the entire usable spectral range of the integrating sphere through its internal design and black absorbing coating. The Slide & Fix holder can be used to combine the light trap with port reducers and the sample holder.

Ex-changeable holders for detectors and light guides 

Ex-changeable adapters are offered for mounting of detectors and light guides. Each has a baffle that can be aligned to one of the five measurement ports accordingly depending on the measurement application. The UMPA port adapter of our modular integrating spheres can hereby be used. 

Reflection coating made of barium sulfate 

The UPB-150-ART is coated with Gigahertz-Optik‘s self-manufactured diffusely reflective barium sulfate (ODP97) coating. The multi-layer coating ensures good diffuse reflective properties over the entire usable spectral range. 

Positions of the five measurement ports of the UPB-150-ART enable its universal application.
The front side of the port plugs, port reduces and sphere surface are at the same level and thus ensure an almost ideal reflection surface.
Light trap for absorption of the transmitted light of transparent samples in 8°/d reflectance measurement setup. Combined with port reducer.
Typical spectral reflection of the sphere coating made of barium sulfate (ODP97).
UPB-150-ART, integrating sphere
UPB-150-ART-Z01, port plug with flat surface
UPB-150-ART-Z02-3, 3mm port reducer
UPB-150-ART-Z02-15, 15mm port reducer
UPB-150-ART-Z02-35, 25mm port reducer
UPB-150-ART-Z03, sample holder
UPB-150-ART-Z04, light trap
UPB-150-ART-Z05, 0.5“ detector adapter with baffle
UPB-150-ART-Z06, 1.0“ detector adapter with baffle
UPB-150-ART-Z07, 2.0“ detector adapter with baffle
UPB-150-ART-Z09, port plug with spherical surface
UPB-150-ART-Z10, port reducer with spherical surface. Free diameter if specified
Short description

Five port integrating sphere for universal use in transmission and reflection measurement application in the 300 nm to 2500 nm spectrum.

Main features

Barium sulfate coating. Machined out of solid material. Therefore very precise spherical shape, position of the application ports and finish of the knife edges of the application ports. Accessory for the application ports with Slide&Fix mounting System. Detector port with baffle.

Measurement range

Diameter: 150 mm (6 inch)

Coating: Barium sulfate. Spectral range 300 nm to 2500 nm

Application ports: five, 30 mm diameter with knife edge, post for Slide&Fix accessory

Detectorport: exhange able Adapters with baffle

typical applications

Spectrophotometer. Other transmission and reflection measurement set-ups.



Sphere diameter

150 mm


ODP97 (Barium Sulfate)

Measurement Port Diameter

30 mm, with knife edge design

Knife edge thickness

0.5 mm

Number of measurement ports


Angle tolerance of port setup

± 0.1 °


Two detachable posts for the Slide & Fix system per port

Detector port

30 mm with circumferential frame (Ø = 58 mm) with lateral V-notch


Flat surface with four M5 threaded bores on a 50 mm pitch circle


approx. 1.6 kg

Type Description File-Type Download
Datasheet UPB-150-ART PDF
Produktname Product Image Description Show product
UMPA-0.5/11 Port adapter for use with UMPF-0.5 port frame of the UM series modular construction integrating spheres.

Features: To attach TD-11, PD-11 or VL-11 detectors and UFC-11 fiber connectors. Optional diffuser window.
UFC-11 Fiber adapter for use with UP and UM type integrating spheres.

Features: SMA, FC, SC and ST connectors.
Article-Nr Modell Description Request / Compare
15297566 UPB-150-ART

Integrating sphere

15297567 UPB-150-ART-Z01

Port plug

15297568 UPB-150-ART-Z02

Port reducer. xx aperture diameter set in 0.1mm steps.xx =

15297496 UPB-150-ART-Z02-3

Port reducer 3mm

15297497 UPB-150-ART-Z02-15

Port reducer 15mm

15297498 UPB-150-ART-Z02-25

Port reducer 25mm

15297569 UPB-150-ART-Z03

Sample holder

15297570 UPB-150-ART-Z04

Light trap

15297571 UPB-150-ART-Z05

UMPF-0.5 Detector adapter

15297572 UPB-150-ART-Z06

UMPF-1.0 Detector adapter

15297573 UPB-150-ART-Z07

UMPF-2.0 Detector adapter

15298198 UPB-150-ART-Z09

Port plug

15298199 UPB-150-ART-Z10

Port reducer. xx aperture diameter set in 0.1mm steps.xx =

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