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UPG-150-ART - multi-functional integrating sphere for reflection, transmission and radiant power in the infra-red spectral range

Photometry to determine key material properties

Key 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 important in both broadband and narrow-band photometric applications for diffuse sample illumination and detection of the reflected and transmitted light proportions.

Gold coating

Gold has a high, constant spectral reflectance within the spectral range between 800nm and 20µm. Integrating spheres with gold coatings are therefore ideally used for applications in the infrared spectral range. Gigahertz-Optik exclusively uses pure gold characterized by a 95% reflectance to coat its integrating spheres for IR applications. The roughness of the inner sphere surface is designed for optimum diffuse reflectance.

UPG-150-ART precision integrating sphere

With the 150mm diameter, the UPG-150-ART provides a good compromise in terms of precision of the sphere function and level of the measurement signal. Its production from a solid 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 UPG-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 or without gloss
  • 0°/d directed and diffuse transmission
  • Measurement with sample absorption correction
  • Two-ray measurement setups
  • Radiant power 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 on the same level as the sphere surface.

Universal sample holder

The sample holder is slid and 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 it 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.

Quick-change holder for detectors and light guides

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

Typical spectral reflectance of the pure gold sphere coating
Alignment of the five measurement ports of the UPG-150-ART enables universal use of the sphere.
The front side of the port plugs and port reducers and sphere surface are at the same level and thus ensure an almost ideal reflection surface
UPG-150-ART multi-port integrating sphere with Slide & Fix system for mounting of accessories.
Light trap for absorption of the transmitted light proportion of transparent samples in 8°/d reflectance measurement setup. Additional port reducer.
UPG-150-ART, integrating sphere
UPG-150-ART-Z01, port plug
UPG-150-ART-Z02-3, 3mm port reducer
UPG-150-ART-Z02-15, 15mm port reducer
UPG-150-ART-Z02-25, 25mm port reducer
UPG-150-ART-Z03, sample holder
UPG-150-ART-Z04, light trap
UPG-150-ART-Z05, 0.5“ detector adapter with baffle
UPG-150-ART-Z06, 1.0“ detector adapter with baffle
UPG-150-ART-Z07, 2.0“ detector adapter with baffle
Short description

Five port integrating sphere for universal use in transmission and reflection measurement application in the infrared spectrum. 

Main features

Coating with pure Gold for highest possible reflection within the IR spectrum. 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: pure gold, 95 % reflectance (850 nm to 20 µm)

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

Detectorport: exhange able Adapters with baffle

typical applications

IR spectrophotometer. Other IR transmission and reflection measurement set-ups.



Sphere diameter

150 mm


ODG95 pure gold

Measurement Port Diameter

30 mm

Knife edge thickness

0.5 mm (knife edge design)

Number of measurement ports


Angle tolerance of port setup

± 0.1 °


Every two removable posts of the Slide & Fix System


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


Flat base with four M5 threaded holes within a 50 mm pitch circle


Approx. 1.6 kg


see download section


Port plug. Sphere surface coated with ODG95.


Port reducer. Aperture diameter specified by customer
set in 0.1 mm steps. Sphere surface coated with ODG95.


Port reducer. 3 mm aperture. Sphere surface coated with ODG95.


Port reducer. 15 mm aperture. Sphere surface coated with ODG95.


Port reducer. 25 mm aperture. Sphere surface coated with ODG95.


Sample holder


Light trap


UMPF-0.5 Detector adapter with Baffle. Sphere surface and baffle coated with ODG95.


UMPF-1.0 Detector adapter with Baffle. Sphere surface and baffle coated with ODG95.


UMPF-2.0 Detector adapter with Baffle. Sphere surface and baffle coated with ODG95.

Type Description File-Type Download
Datasheet UPG-150-ART PDF
Datasheet Dimensions UPG-150-ART PDF
Datasheet Dimensions UPG-150-ART-Z01 PDF
Datasheet Dimensions UPG-150-ART-Z02 PDF
Datasheet Dimensions UPG-150-ART-Z02-3 PDF
Datasheet Dimensions UPG-150-ART-Z02-15 PDF
Datasheet Dimensions UPG-150-ART-Z02-25 PDF
Datasheet Dimensions UPG-150-ART-Z03 PDF
Datasheet Dimensions UPG-150-ART-Z04 PDF
Datasheet Dimensions UPG-150-ART-Z05 PDF
Datasheet Dimensions UPG-150-ART-Z06 PDF
Datasheet Dimensions UPG-150-ART-Z07 PDF
Produktname Product Image Description Show product
Article-Nr Modell Description Request / Compare
15297574 UPG-150-ART

Integrating sphere

15297575 UPG-150-ART-Z01

Port plug

15297576 UPG-150-ART-Z02

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

15297628 UPG-150-ART-Z02-3

Port reducer 3mm

15297629 UPG-150-ART-Z02-15

Port reducer 15mm

15297630 UPG-150-ART-Z02-25

Port reducer 25mm

15297577 UPG-150-ART-Z03

Sample holder

15297578 UPG-150-ART-Z04

Light trap

15297579 UPG-150-ART-Z05

UMPF-0.5 Detector adapter

15297580 UPG-150-ART-Z06

UMPF-1.0 Detector adapter

15297581 UPG-150-ART-Z07

UMPF-2.0 Detector adapter