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Page 1
6612-3000
MODEL
Progressive Scan Interline Transfer
CCD Camera with Digital Output
The 6612-3000 offers progressive scan capabilities and digital output, making it
ideal for applications requiring precise imaging of a fast moving subject.
Designed and manufactured in the U.S.A.
The Cohu Model 6612-3000
Digital Progressive Scan camera
enables the user to acquire full
frame images of dynamic objects
with the noise rejection character-
istics of differential LVDS 10-bit
digital output and no pixel jitter.
The 6612-3000 is designed to be
used with external image capture
devices and is ideal for use in
high-speed “stop action” applica-
tions. Progressive scan technol-
ogy eliminates motion artifacts or
smearing of moving objects and
provides the full vertical resolution
lacking in standard RS-170 video
formats. The 1/2” format interline
transfer sensor technology, with
an array size of 659 (H) X 494 (V),
provides excellent sensitivity with
low noise.
The Cohu 6612-3000 camera
will operate via internal clock or
can be configured to accept timing
from an external device. The
camera provides both analog and
digital output. Progressive scan
mode will support 30 frames per
second from either a single analog
BNC connector or 10 bits of
digital output from the digital
connector. The interlaced mode
will enable capture of 60 frames
per second via either the dual
BNC connectors or 20 bits of
digital output from the digital
connector. Selection of operating
mode, shuttering speed, asyn-
chronous reset triggers, and gain
can be controlled through the
auxiliary connector or via internal
switches. The camera enables
single image “snapshot” of events
immediately after application of
trigger pulse at a maximum of 60
trigger pulses per second.
Analog RS-170 and/or 10-bit
digital signals are supported as
standard outputs. Analog video
output is useful for quick setup of
the camera while the Low Voltage
Differential Signal (LVDS) output is
used to supply frame grabbers
with jitter-free input for applica-
tions that require extreme preci-
sion and accuracy.
APPLICATIONS AND FEATURES
Particle ImageVelocimetry
High performance specifications and flexible configurations
enable high frame rates and accuracy for fluids experiment
solutions.
Laser Measurement
In “snap shot mode,” its full frame resolution at fast shutter
speeds improves beam measurements.
Machine Vision
60 fps high resolution video output increases system productiv-
ity and reduces cost. Asynchronous shuttering supports wide
range of in-line inspection systems.
Sub Pixel Interpolation
The CCD imager provides for stable calibration of instruments.
X-Ray Imaging
Full-frame blur-free image with square pixels improves measure-
ment accuracy at twice the speed of RS-170A cameras.
ISO-9001 Certified

Page 2
Shutter and Integration Modes of the Cohu Model 6612-3000 Camera
No Shutter:The sensor integrates over the full vertical interval (1/30 second in single channel mode or
1/60 second in dual channel mode).
Flickerless: When using 50 Hz fluorescent lighting, this 1/100-second shutter guarantees exposure to
only one fluorescent light cycle.
Programmable Shutter:There are nine settings ranging from one frame to 16 frames.
Programmable Integration:There are eight settings ranging from two fields to 16 fields.
External Integration: Using an external pulse, the integration interval can be set to the desired integra-
tion level.
Operating Modes of the Cohu Model 6612-3000 Camera
The Cohu Model 6612-3000 Progressive Scan camera is designed to be used with an external image capture
device (frame grabber) to capture dynamic events.Its various operating modes can be controlled by internal
switches or externally through the auxiliary connector. Digital data is provided with 10 bits for up to 30 frames per
second (fps) or with 20 bits for up to 60 fps. Analog RS-170 or progressive scan output formats are supported at
30 fps via a single BNC connector, or at 60 fps using dual BNC connectors. Fast shuttering eliminates a strobe
light in many applications. The asynchronous reset trigger will immediately acquire a full frame of video. External
integration allows direct control over sensor exposure time. Pixel clock output can be added if desired. Request
the Cohu frame grabber compatibility reference sheet from your representative or from the technical notes page at
www.cohu.com/cctv.
Continuous Operation The camera operates in a traditional CCD camera mode. It uses the internal clock to
support all shutter and long-term integration capabilities in progressive scan or interlace modes.
• Crystal or phase lock loop (PLL) This operation allows the camera to genlock to standard RS-170 sync
sources
Programmable high speed shutter, up to 1/10,000 second, and low speed shutter integration up to 16 frames
Snap Shot Operation This mode captures clear images of fast moving subjects.
Capture initiated with external asynchronous TTL triggers
• Supports all high speed and low speed shutter settings
External Integration Extend the sensor exposure, from 16 ms to several minutes, for low light level applica-
tions.
• Allows direct low speed shutter control using an external pulse (duration of pulse determines exposure time)
Video Control Mode and gain settings are controlled either internally with switches and potentiometers or
externally through the auxiliary connector.
• Video rates of 30 fps (one BNC connector or 10 bits from the digital connector) or 60 fps (two BNC connectors
or 20 bits from the digital connector.)
• Video amplifier gain (up to 28 dB) and channel balance control
• Individual channel gamma control (0.45 to 1)
• Individual channel sharpness control
• Manual or automatic gain control
• Auto iris or DC iris lens control (for use with automatic lenses)

Page 3
Specifications
Imager
Monochrome, 1/2" format, interline transfer square pixel array
Format
Selectable;interlaced, (RS-170 1 Vp-p) or non-interlaced at 60 frames per second through two
connectors, (1 Vp-p), or non-interlaced at 30 frames per second through one connector, (1 Vp-p)
LVDS digital video through one D connector;10-bit parallel data with horizontal, vertical,
composite sync, and pixel clock.
Pixel Array
659 (H) X 494 (V)
Pixel Rate
12.2727 MHz
Cell Size
9.9 µm x 9.9 µm
Sync
Internal crystal, external H&V and async reset. Async reset triggers output of one frame of
data at exposure set by shutter controls followed by blanked output with H sync. Stability:<20
ns;Jitter:<25 ns.
Sensitivity
3200K faceplate illumination. Full video, no AGC:4 lux;80% video, AGC on:0.15 lux
Gain
AGC/Manual adjustable up to 28 dB. Internal, external, or remote via aux.connector Each
channel can be balanced to provide equal gain.
S/N Ratio
Greater than 56 dB (gain 0 dB, gamma 1, in a 0-6 MHz bandwidth)
Gamma
Adjustable .45 to 1.0
Sharpness
Selectable from minimum to maximum, affects both analog and digital
Integration
Switch or external selectable 8-step shutter, (1/60 sec.to 1 /I 0,000). External control of shutter
mode, shutter speed, H&V, async reset and integration through the Aux.connector
Output
20 bit, low voltage differential signal (LVDS), 10 bits each channel
Lens Mount
C/CS
Lens Drive
Switch selectable auto iris drive (video), or DC iris drive.(DC level)
Weight
11 oz. (320 g) without lens
Power
12 VDC
Mount
1/4-20 female thread, top and bottom of housing in line with optical axis.
Humidity
Up to 95% relative humidity (non-condensing)
Vibration
Per Mil-STD-810 (E) Method 514.4.Categories 1, 8, and 10 (less lens)
Reliability
MTBF: 20,000 hours (less lens)
Shock
No damage to 30 g, 11 ms duration (less lens).
Altitude
Sea level to 10,000 ft./3,000 meters (508 mm/20" Hg.)
Temperature
-4°F to 158°F (-20°C to 70°C)
Approvals
FCC class “A”;CE EN55022, 50081-1, EN50082-1
Output Cable
40’/12m maximum length typical with CAT3 cable;up to 200’/60m typical with CAT5
Modulation Transfer Function
Spectral Response

Page 4
6612-3000 (3/99) Printed in USA
ADVANCED
VIDEO
TECHNOLOGY
Made in the U.S.A.
Cohu reserves the right to change specifications without notice.
Cohu,Inc./Electronics Division
P.O.Box 85623 San Diego, CA 92186
Phone:858/277-6700 • Fax:858/277-0221 • Internet:www.cohu.com/cctv
Ordering Information
6612-3000/0000 Monochrome progressive scan camera, digital output. Includes auxialliary connector, power
connector, and auto-iris lens connector.
Accessories
8385-5
115 VAC to 12 VDC power supply
ER 3774
System integration cable, 7 ft (2.1 m)
Lenses
This camera is designed to support a wide variety of lenses. Contact your Cohu representative
for a complete list.
DIMENSIONS
“Equipment manufactured by Cohu does not use any real-time processing that is related to any calendar.Therefore, you will
not have a Year 2000 problem with any Cohu camera or control system component, regardless of model number or date of
purchase.”