Infinity EX Camera System Module.pdf - 第6页
INFINITY EX CAME RA SY STEM MO DULE MECHANICAL DETA IL 17.6 Technical Reference Manu al Chapter Issu e 3 Jan 04 The board and screen image s pass through their respectiv e beam splitter cube to the prism, whic h deflects…
INFINITY
EX
CAMERA SYSTEM MODULE
MECHANICAL DETAIL
Chapter Issue 3 Jan 04 Technical Reference Manual 17.5
MECHANICAL DETAIL
Green Camera The camera, through the optical unit, looks up and down simultaneously, this
allows the board image and stencil image to be displayed together on the monitor
screen.
To enable both images to be seen simultaneously, without degradation in picture
quality, a high resolution camera is used. The camera has a resolution of 752 x
582 pixels
Optical and Lighting
Unit
The optical and lighting unit performs three main functions:
• Redirection of the board and screen images onto the camera sensor
• Illumination of the board and screen for image capture
• Focusing of the board and screen images
Figure 17-2 Optical and Lighting Unit
Screen
Board
Optical Unit
Prism
Convex Lens
Glass
Window
Beam
Splitter
Cube
Oblique
Lighting
Lens Block
Telecentric Stop
Direct Lighting LED’s
Focus
Camera
Focus Assembly
INFINITY
EX
CAMERA SYSTEM MODULE
MECHANICAL DETAIL
17.6 Technical Reference Manual Chapter Issue 3 Jan 04
The board and screen images pass through their respective beam splitter cube to
the prism, which deflects the images by 90° towards the camera. The images
pass through a lens block which deflect the beams through the telecentric stop
to the camera. The distance between the lens block and the telecentric stop is
fixed. By moving the lens block and telecentric stop in relation to the optical
unit enables focusing to take place.
The optical unit employs LEDs for direct and oblique lighting. The direct
lighting is achieved by a block of six LEDs, one block for board lighting and one
for screen lighting. The oblique lighting is achieved by a ring of twelve LEDs
around the glass window, one ring for board lighting and one for screen lighting.
Figure 17-3 LED Ring Lighting
Each lighting group can be set by the operator to a level between 0 and 15, where
15 is the brightest.
The set levels for the lighting are stored in the product file, allowing a lighting
setup to be transferred from one machine to another simply by loading a new
product file.
Green Camera 2 The camera, through the optical unit, looks up and down simultaneously, this
allows the board image and stencil image to be displayed together on the monitor
screen.
To enable both images to be seen simultaneously, without degradation in picture
quality, a high resolution camera is used. The camera has a resolution of 752 x
582 pixels
Optical and Lighting
Unit
The optical and lighting unit performs three main functions:
• Redirection of the board and screen images onto the camera sensor
• Illumination of the board and screen for image capture
• Focusing of the board and screen images
Direct Lighting LED
Oblique Lighting LED
Plan View of Screen Oblique Lighting
(board oblique lighting is a mirror image)
Plan View of Screen Direct Lighting
(board direct lighting is a mirror image)
INFINITY
EX
CAMERA SYSTEM MODULE
MECHANICAL DETAIL
Chapter Issue 3 Jan 04 Technical Reference Manual 17.7
Figure 17-4 Optical and Lighting Unit
The board and screen images pass through to their respective prism, which
deflects the images by 90° towards the camera. The images pass through a lens
block which deflect the beams through the telecentric stop to the camera. The
distance between the lens block and the telecentric stop is fixed. By moving the
lens block and telecentric stop in relation to the optical unit enables focusing to
take place.
The optical unit employs LEDs for direct and oblique lighting. The direct
lighting is achieved by a block of six by six LEDs, one block for board lighting
and one for screen lighting. The oblique lighting is achieved by a ring of twelve
LEDs around the glass window, one ring for board lighting and one for screen
lighting.
Screen
Board
Optical Unit
Prism
Glass
Window
Oblique
Lighting
Lens Block
Telecentric Stop
Direct
Lighting
LED’s
Focus
Camera
Focus Assembly
Prism