What is Helium Rough and who benefits
What is new in the Helium Rough?
Versions history
Gallery

Documentation
FAQ

Creating and customizing appraisers (PDF)
Creating and customizing pricelists (PDF)
Creating and customizing Pricelists from Rapaport CSV files(PDF)
 
Laser Mapping of Concavities
The sizes of stones scanned by Helium Rough
Technology patent "A method and apparatus for locating inclusions in a diamond stone"
PACOR - Advanced Computer technologies for Processing of Rough diamonds
External cut modules
 
Reports

Customizing printing and viewing reports
Customizing export data
Customizing MS Word report templates
 
Helium Rough download
Helium reports documentation (PDF)
 
DiamCalc
DiBox
GemAdviser Free Version
Helium IG
Helium Polish
Helium Rough
Helium Tender
M-Box 2.0
M-Box 1.5
M-Box
Oxygen DZ
Oxygen HIG
Oxygen Immersion
Oxygen Inclusion
Oxygen Microscope Server
Oxygen Viewer Free Version
Oxygen XRay Server
Pacor
Pacor Client
Stereo Viewer Free Version
ViBox

PACOR - Advanced Computer technologies for Processing of Rough diamonds
Laser Mapping of Concavities
Scanning major and minor symmetry features
Technology patent "A method and apparatus for locating inclusions in a diamond stone"
Immersion Glass
 
Laser Mapping of Concavities

From the materials of Pricescope Diamond Journal
"Lasers used in planning the cutting of diamonds"
by Garry Holloway

All scanners build 3D virtual models by photographing the shadow profile of a rotating gem in front of a light source. But this method misses concavities (see the example in first image). Using the ‘triangulation principle’ a low power visible line (e.g. from a ‘lecture pointer’ type laser beam) is directed onto the rough gemstone from an oblique angle of about 30° to the camera. From the cameras perspective a convex object, like a sphere, shows a line curving away from the center, but the light shines into any concavities or holes, and the camera sees an inward curving line. Software calculates the depth of the concavity and adjusts the 3D model.

OctoNus developed a dual laser cavity mapping system that gets to the bottom of more holes than the single red laser light system as shown in the example below.

Two Helium Rough camera views (the first in shadow profile mode) of irregular shaped rough diamonds showing two laser lines (in black and white). Concave distortion in the vertical beams from the two laser beams show the rough has cavities. These cavities are not able to be detected in the shadow edge silhouette.

Dual Laser mapping

What is Dual Laser cavity mapping? How does it work? Why Dual Laser mapping is better then Single Laser mapping?

There are two samples with models obtained by different types of scanning in the table below. The detailed descriptions, diagrams and movies are available.

Examples of models obtained by different types of scanning

Shadow model Laser mapping model by one laser
Laser beam from left
Laser mapping model by one laser
Laser beam from right
Dual Laser mapping model
The cumulative result
Movies: Sample 1
Movies: Sample 2

Coins

There are Dual Laser mapping models of coins obtained on Helium Rough 1:4D scanner. You can download and explore .oxg demo files with Oxygen Viewer Free Version and Oxygen Inclusion.

50 Cents, New Zealand
50 Cents, New Zealand

Download coin_hiacc.oxg

5 Rand, Republic of South Africa
5 Rand, Republic of South Africa

Download coin_5rand.oxg