Rhopoint IQ (Goniophotometer) 20°/60°/85°
DOI / RIQ Meter, (quantify orange peel)
The Rhopoint IQ Gloss Haze & DOI Meter quantifies surface quality problems that are invisible to a standard glossmeter and profiles how light is reflected from a surface. The Rhopoint IQ instrument measures the following parameters in a single button push: 20/60/85° GLOSS • HAZE• REFLECTED IMAGE QUALITY (RIQ) • DISTINCTNESS OF IMAGE (DOI) • RSPEC Gloss: A measurement proportional to the amount of light reflected from a surface measured at 20° ( high gloss finishes) , 60° ( mid gloss finishes ) and 85° ( matt finishes)
Haze: Reflection haze is scattered light caused by micro texture and is measured adjacent to the main gloss component. Symptoms – A milky finish is seen on high gloss coatings, halos can be visible around reflections of bright light sources. Causes (coatings) – Dispersion problems, raw material incompatibilities, incorrect curing or stoving. Causes (other) – Cleanliness, ageing, oxidisation, scratching, polishing.
RIQ: RIQ is used to quantify effects such as orange peel and surface waviness. This new parameter gives higher resolution results compared to Distinctness of Image (DOI) measurement and better mimics human perception of surface texture, especially on high quality finishes such as automotive. Symptoms of Poor RIQ: Orange peel, brush marks,waviness or other structures visible on the surface. Reflected images are distorted. Causes – Application problems, incorrect coating flow, coating viscosity too high/low, sag or flow of coating before curing, incorrect particle size/distribution, overspray, improper flash/recoat time, inter coat compatibility, incorrect cure times and cure temperature.
DOI: A measure of how clearly a reflected image will appear in a reflective surface.
RSPEC: The peak gloss value over a very narrow angle.
Features:
- Easy to read full colour screen with adjustable brightness
- 6 button touch sensitive interface
- Fully automatic calibration with tile detection and verification for error-free calibration
- Pocket sized instrument with integrated tile holder
- Pass / fail for easy identification of non-conformances
- Full onboard statistics (max, min, mean, S.D.)
- On-board trend analysis graphs
- Results batching with user definable names
- Direct data input via Bluetooth – This allows each reading to be instantly transmitted to any PC package such as Excel, Word, SPC programs etc.
- Software-free data transfer – USB download of results to PC without the need to install software
THE ULTIMATE GLOSSMETER UPGRADE
Orange peel dramatically reduces appearance quality without affecting gloss readings. These two test panels measure identically with a standard glossmeter. The Rhopoint IQ with RIQ/DOI measurement can quantify the differences. 
Haze is a common problem associated with coatings and polished materials. Surfaces with haze have a “milky” finish with a “shallow” reflected image. This important characteristic is directly measured with the Rhopoint IQ.THE RHOPOINT IQ MEASURES 20/60/85° GLOSS • RSPEC • REFLECTANCE HAZE REFLECTED IMAGE QUALITY • DISTINCTNESS OF IMAGE GONIOPHOTOMETRIC CURVES
GLOSS
A measurement proportional to the amount of light reflected from a surface. Geometry: The correct measurement geometry should be used according to the sample finish – matt: 85°, mid gloss: 60°, high gloss: 20°.
RSPEC
The peak gloss measured over a very narrow angle. Usage: It is very sensitive to surface texture and can be used to identify subtle differences in smooth surfaces.
REFLECTANCE HAZE
An optical effect caused by microscopic texture or residue on a surface. Visible Symptoms: A milky finish is apparent on the surface with a loss of reflected contrast. Halos and patterns can be seen around reflections of high intensity light sources. Causes: Poor dispersion, raw material incompatibility, additive migration, vehicle quality, stoving/drying/curing conditions, polishing marks, fine scratches, ageing, oxidisation, poor cleanliness/surface residue.
REFLECTANCE HAZE COMPENSATION
The instrument compensates for reflection from within the coating for highly reflective pigments, metallic coatings and speciality pigments, allowing the haze of any painted surface to be measured
REFLECTED IMAGE QUALITY (RIQ)
RIQ is used to quantify effects such as orange peel and surface waviness. This new parameter gives higher resolution results compared to Distinctness of Image (DOI) measurement and better mimics human perception of surface texture, especially on high quality finishes such as automotive. Symptoms of Poor RIQ: Orange peel, brush marks, waviness or other structures visible on the surface. Reflected images are distorted. Causes: Application problems, incorrect coating flow, coating viscosity too high/low, sag or flow of coating before curing, incorrect particle size/distribution, overspray, improper flash/recoat time, inter coat compatibility, incorrect cure times and cure temperature.
DISTINCTNESS OF IMAGE (DOI)
A measure of how clearly a reflected image will appear in a reflective surface.
Measurement
Fast measurement of all parameters. Full on-board statistics with graphical trend analysis and reporting.
Simultaneous measurement of all parameters, results are date and time stamped.
Displays full statistics for the number of readings in the current batch.
Graphical reporting for quick trend analysis.
Pass / fail parameters can be defined for instant identification of non-conformances
Goniophotometric Curves
Different types of surface textures produce identifiably shaped reflectance profile. This goniophotometric data can be downloaded to PC for further analysis and comparison via the USB cable or Bluetooth Data Widget.
Easy Batching
User definable batch names and batch sizes for quicker and more efficient reporting.
Rapid data transfer Software-free data transfer.
USB connection to PC instantly recognises the device as a drive location which facilitates the quick transfer of files using Windows Explorer or similar.
Direct data input via Bluetooth
Instantly transmit measured readings directly to programs such as MS Excel on your PC / tablet to greatly simplify the reporting process. 
Power
20,000+ readings per charge. The Rhopoint IQ Gloss Haze & DOI Meter is rechargeable via USB/PC or mains.
Texture Analysis
Need to measure surface texture, waviness and quantify the defects of all coated surfaces from low gloss to mirror finish? Visit Optimap-PSD for more information
