Opus OSIRIS User manual

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www.opusinstruments.com Opus Instruments Limited
1
OSIRIS
Opus Instruments Ltd
Infrared Imaging System
USER MANUAL

2
CONTENTS
Page
1 Your camera 4
2 Unpacking and Assembly 5
3 Software Installation 6
4 User Interface 8
5 Calibrating the camera 13
6 Lighting 16
7 The lens F/number 19
8 Initial Setup 20
9 Taking a Picture 21
10 Reference appendices 24
Declaration of Conformity 3
Cover—The Magdalen NG719
by kind permission of
The National Gallery London
27
Depth of Field
0
1000
2000 3000 4000 5000 6000 7000
2500 3000 3500 4000 4500 5000 5500 6000
Object to came ra body distance
mms
Depth of Field
mms
8 11 16 22 32
Lens
F/number

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Depth of Field
0
200 400 600 800
1000
600 800 1000 1200 1400 1600 1800 2000
O bje ct to came ra body distance
mms
D epth of F ield
mms
8 11 16 22 32
Lens
F/number
3
For customers in the USA
Declaration of Conformity
Model Number
Trade name
Address
OSIRIS –A1
Opus Instruments Limited
Beacon House
Nuffield Road
Cambridge
UK CB4 1TF
Tested to comply with FCC standards
FOR OFFICE USE
This device complies with Part 15 of the FCC rules. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including
interference that may cause undesired operation.
For customers in Canada
This Class A digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
For customers in the EEC
The “CE” mark indicates that this product complies with the requirements
for safety, health, environment and customer protection.
March 2008

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1. Camera body
2. Focussing attachment
3. Lens (filter not shown)
4. USB port
5. Power inlet
6. Power switch
7. Coarse focus lock
8. Fine focus adjustment
9. Focus scale
YOUR CAMERA
25
Focus Scale R eading
against Object distance
0
10 20
30 40 50 60 70 80 90
100
700 900 1100 1300 1500 1700 1900
Obje ct Distance mm
Scale
to 1900
0 2 4 6 8 10 12
14 16 18 20
2000 3000 4000 5000 6000 7000 8000
Obje ct Distance mm
Scale
from 2000

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Field of View
0
500
1000 1500 2000 2500 3000 3500 4000 4500 5000
0 500 1000 1500 2000 2500 3000 3500
Field
mm
Object to
camera
mm
5
Your camera case holds the following parts;
Camera body
Lens and
focussing
attachment
Power supply
USB lead
Instruction manual
ASSEMBLY
1. Lay the camera on its back and insert the 2 rails of the focus
attachment into the two holes in the front of the camera
ensuring that the rods push fully home and the scales are
away from the camera and facing up. When the rods are
inserted use the Allen Key in the two holes in the bottom of
the camera to tighten the two bolts by turning clockwise.
2. Remove the black plastic cover from the bellows plate
ensuring that no dirt falls inside the camera.
3. Slide the lens assembly onto the 2 rods and secure the lens
plate to the bellows using the 4 thumbscrews.
4. The camera can either be stood on a flat surface or attached
to a tripod. The base has both 1/4” and 3/8” standard tripod
screw threads.
UNPACKING and ASSEMBLY

6
SOFTWARE INSTALLATION
INTRODUCTION
The software application files are supplied on CD rom
compressed into a single self-installing executable
SETUP.EXE. Run this as described below to install the
application files.
INSTALLATION OF THE APPLICATION SOFTWARE
To install the software and drivers, follow the steps below:
Place the CD ROM in your CD drive
From the system Start menu, select Run
Click on the Browse button of the dialog box that opens
Click on the down arrow of the Look in drop down list of
the Browse window that opens
Select your CD ROM drive in this list
Select SETUP.EXE from the file names that appear in
the file list and then click on the Open button
Click on the OK button of the Run dialog box and then
follow the on-screen instructions.
The software will then be installed into the directory that
you have specified.
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TAKING A PICTURE
EXAMPLE 2
You have an object 600 x 400mm which has a total depth of
only a few mm. How do we set up the camera.
The largest dimension is 600mm so looking at the Field of
View graph we note that we must set the camera at least
1250mm away from the object. Let us choose 1500mm to
have a margin of error.
Looking at the Focus scale reading graph, for a distance of
1500mm we use the blue line and axes. This gives a scale
reading of 23. We set the lens to 23.
Looking at the first Depth of Field graph we see that at F/8
and a distance of 1500mm we have a depth of field of 10’s of
mm. We set the lens to F/8.
At F/8 we will need about 250 LUX at the object.
Now we are ready to scan the object and adjust the focus
using the fine focus.

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TAKING A PICTURE
EXAMPLE 1
You have an object 1200 x 1600mm which has a total depth
of 400mm. How do we set up the camera.
The largest dimension is 1600mm so looking at the Field of
View graph we note that we must set the camera at least
2750mm away from the object. Let us choose 3000mm to
have a margin of error.
Looking at the Focus scale reading graph, for a distance of
3000mm we use the green line and axes. This gives a scale
reading of 13. We set the lens to 13.
We need a depth of field of 120mm. Looking at the second
Depth of Field graph we see that for a depth of field of
400mm at 3000mm we need to have a lens F/number greater
than 16. We set the lens to F/16.
At F/16 we will need to have 4 times the illumination level
than at F/8 (double the light for each stop). We therefore will
need to provide about 1000 LUX at the object.
Now we are ready to scan the object and adjust the focus
using the fine focus.
7
SOFTWARE INSTALLATION
INSTALLATION OF THE CALIBRATION FILES
When you first run the application, it will create a special
directory for the calibration files and copy the factory
generated calibration files into this directory. By default this
directory is C:\Documents and Settings\All Users\Application
Data\Osiris. Do not create this directory yourself otherwise it
will not be accessible to other users.
INSTALLATION OF THE DRIVER
The Osiris USB driver must be installed on the PC in order for
the PC to be able to communicate with the camera.
The driver osiris.sys is located in the root directory of the
CD. It will also be copied to the hard drive when the
application is installed. It will be copied into the <installation
directory>\usbdriver directory.
When you first connect the camera to the USB port of a PC
running Windows 2000, Windows XP or Windows Vista, and
switch on the camera, the operating system will detect that it
has been connected and open a Found New Hardware
window. Follow the on-screen instructions directing the
operating system either to the Osiris CD or to <installation
directory>\usbdriver. The operating system will find osiris.inf
and use the information in this to install osiris.sys.
Note that the driver is not signed. If you have your operating
system configured so that it will only install signed drivers
then you will need to disable this feature. Also you may need
to repeat the driver installation process if you connect the
camera to a different USB port on the same PC.

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THE USER INTERFACE
STARTING UP
When you start the programme the window below will appear.
If the camera is not connected or switched on then you will
receive the message
USB interface to camera not found.
Check the camera is switched on and the USB connected
and then click INITIALISE on the CAMERA menu
If this fails then exit the programme and check the connections
and then restart the programme. Note the camera will only
operate from the USB port that was originally chosen when you
first installed the software.
If the camera is connected you will hear the camera carry out
some start-up tests. After a few seconds the camera will scan a
21
TAKING A PICTURE
Set the lighting
Setup the lighting to provide approximately 250 LUX if using
Tungsten Halogen sources and operating at F/8.
Check the Lighting Level
Select a position on the image (move mouse pointer on
screen and press SHIFT and the LEFT MOUSE BUTTON).
Hover the mouse pointer over the captured area, at the
bottom left of your screen the intensity is displayed. If the
intensity reads 100% then reduce the illumination by either
moving the lighting away from the object or by increasing the
F/number. If the number is below 50% then increase the
illumination or decrease the F/number.
Check the Focus
Ensuring your image is in focus is the most important step to
ensure high quality, high resolution images. This process
will take some time until you become practised. The focus at
the sides and top and bottom of the object will need to be
checked.
Pre-scan
Select the area of interest, to do this move the mouse to the
top left corner of the area of interest, press and hold the
SHIFT key whilst dragging the mouse to the bottom left
corner of the area of interest. This may be repeated until the
area of interest selected is correct.
FAST CAPTURE
The camera will take a fast scan (approximately 1 minute for
a full image). The focus and illumination can now be
checked.
CAPTURE AND SAVE
Click on CAPTURE and at the end of the scan if you wish to
save the image, click SAVE.

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INITIAL SETUP
Camera—Object Distance
Using the graph in the appendix select the camera object
distance for the size of your object. Remember the camera
has a square image format so take the largest object
dimension.
ALL MEASUREMENTS SHOULD BE TAKEN
FROM THE CENTRE OF THE OBJECT TO
THE FRONT OF THE CAMERA CASE
Set the nominal focus
Use the graphs in the appendix to select the focus setting and
adjust the lens. The focus scale should be read at the front of
the lens as per the diagram below. Which shows the lens set
to 32.
Set the F/number
Estimate how flat is your object. For flat objects set the
camera to F/8. For non flat object use the graphs in the
appendix to select the F/number.
Fine
Focus
Knob
Read
Scale
Here
9
THE USER INTERFACE
central image area and if there is sufficient light an image will
appear.
THE SCREEN
The screen consists of several areas.
The central portion of the screen is your image area.
The left hand side menu has the user controls that allow
you to capture and save images.
The menu bar at the top has functions for calibrating and
setting up the camera.
At the bottom left of the screen the intensity of the pixel
under the mouse pointer is displayed.
THE IMAGE AREA
Your Osiris camera has its scan area divided up into 64
squares or tiles as shown below – each tile is 512 x 512 pixels.
Osiris always scans a rectangle which is a whole number of
tiles wide and high.

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THE USER INTERFACE
SELECTING AN AREA OF INTEREST
Move the mouse to a point on the image area. Press and
hold the SHIFT key whilst clicking with your left mouse
button. The camera will move to that position and scan the
new area. Note previously scanned areas will still remain
on the screen. To clear the screen left click your mouse on
the CLEAR SCREEN button.
In order to capture an area of interest you must first select
the area of interest. Move the mouse to a corner of your
required area of interest. Now click the left mouse button
and whilst holding the button move the mouse to the
opposite corner of your area of interest and release the
mouse button. A rectangle will be drawn on the image
area as shown below.
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THE LENS F/NUMBER
Varying the lens F/number
The lens F/number is set by rotating the ring on the lens.
Your lens has an F/number that can vary from 5.6 to 45 in
steps. Varying the lens F/number has 3 effects.
1. The larger the F/number the greater the depth
of field at the object. Objects which are not flat
will require larger F/numbers to ensure that the
whole of the object is in focus. The depth of
field for different object distances and lens F/
number is given in the appendices.
2. The larger the F/number the less light that the
camera will collect. In order to maintain the
amount of light on the detector either the
exposure time must be increased or the
illumination levels increased. An increase by
one stop (e.g. F/11—F/16) will require a factor
of 2 increase in illumination.
3. The resolution of the camera is a function of
both the detector and the F/number. For low F/
numbers the resolution is limited by the
detector. For F/numbers greater than F/16 the
resolution is limited by the F/number. Optimum