HIGH-RESOLUTION COLOR

HIGH-RESOLUTION COLOR
HIGH-RESOLUTION COLOR
INSTRUMENTS
FROM YOUR MONOCHROME CAMERA
Micro*Color™ & Macro*Color™ tunable RGB filters for digital imaging
Maximize resolution and color rendition for:
• Brightfield and fluorescence microscopy
• Pathology
• Historical document imaging
• Machine vision
MICRO*COLOR™ & MACRO*COLOR™ TUNABLE RGB FILTERS
TRUE COLOR WHEN YOU NEED IT—Turn your monochrome CCD camera into a high-resolution
color imaging system using CRI’s Micro*Color or Macro*Color liquid crystal tunable RGB filters.
CRI’s tunable RGB filters utilize liquid crystal technology to switch rapidly between the red, green, and
blue color states. Each color state is carefully designed to transmit, as closely as possible, wavelength
ranges that match the individual color sensitivity curves of the human eye. The red, green, and blue
color states can be selected by computer control in any order, and the exposure time for each color can
be varied to provide an accurate white balance.
Three grayscale images are acquired in quick succession as the filter automatically changes color
states. The images are combined into a single high-quality RGB image. The whole vibration-free
process occurs within milliseconds and uses no beamsplitters, filter wheels, or any moving parts.
The Micro*Color filter is designed for use on microscopes with C-mount camera ports and comes built
into a slider mechanism in a 0.65X microscope coupler. The C-mount equipped coupler simply screws
onto standard C-mount fixtures between your microscope and your digital camera. No other adapters
are necessary.
Benefits of using the new Micro*Color 2 coupler, a
0.65X microscope coupler with a built-in liquid crystal
RGB filter:
• Simply pull a lever to switch between B&W or
COLOR
The Macro*Color filter is designed to accommodate the wide variety of cameras and lens adapters
used in standard or macro digital photography, and features a large, 35 mm active area.
Both the Micro*Color and Macro*Color filters are operated using computer control via a separate
compact electronics controller box that accepts simple commands from either a serial (COM) port,
parallel (LPT) port, or a TTL/Sync source.
• Twice the brightness of a normal 1X microscope
coupler at the image plane
• Twice the field-of-view of a normal 1X microscope coupler, which means that more of what is
visible through the eyepieces can be captured on
the CCD
• Uses standard C-mount hardware to fit all
microscopes equipped with standard C-mount
camera ports
• Utilizes apochromatic optics, which means that
the red, green, and blue images formed are
relayed to the CCD without color-based changes in
sharpness
Macro*Color filter for large
aperture applications
SOLID-STATE: NO MOVING PARTS AND NO VIBRATION
FEATURES AND BENEFITS
Filter wheel vibration during image capture can cause
misregistration of colors. Solid-state CRI filters prevent
this from happening.
CRI, Inc.
Page 2 – RGB Filters
35-B Cabot Road
•
High-resolution color images from a monochrome CCD camera when you want them
•
Better spatial resolution and color accuracy than conventional “painted-pixel” CCD cameras
•
Lower cost than triple-CCD cameras and no pixel misregistration issues
•
Solid-state liquid crystal technology with no moving parts, no vibration, and no noise
Woburn, MA 01801
Tel: 781.935.9099
Fax: 781.935.3388
Toll-Free: 1.888.372.1242
e-mail: instrumentsales@cri-inc.com
Website: www.cri-inc.com
Conventional 1.4 megapixel “paintedpixel” color camera
Macro*Color filter with 1.4 megapixel
monochrome camera
Detailed scene imaged using two camera configurations
under the same conditions
EXTRAORDINARY COLOR AND OUTSTANDING RESOLUTION
The closer you look, the more you’ll notice that not only are images taken with the Micro*Color and
Macro*Color filters exceptionally accurate in color rendition, but they also contain detail not
reproducible using conventional color cameras. CRI’s Micro*Color and Macro*Color filters enable you
to exploit the full potential of your high-resolution monochrome camera for both color and black & white
images.
Micro*Color and Macro*Color filters also contain Color Shaping Glass (CSG), which corrects for the
spectral response of most CCD cameras to improve color balance and dynamic range. The CSG also
acts as a blocker of unwanted near-infrared (NIR) light.
MICRO*COLOR APPLICATIONS
MACRO*COLOR APPLICATIONS
•
Brightfield microscopy
•
High-resolution film scanning
•
Fluorescence microscopy
•
Historical document imaging
•
Pathology
•
Machine vision
The Micro*Color coupler allows you to slide the liquid
crystal out of the light path when needed for low light
level fluorescence.
COMPATIBLE WITH MANY CAMERAS AND THIRD-PARTY SOFTWARE PACKAGES
Why is a tunable RGB filter better than
conventional color cameras?
Most digital color cameras utilize a single “painted-pixel”
image sensor, in which the individual pixels are coated with
either a red, green, or blue dye. Since individual pixels only
receive light of a single color, software interpolation
routines are necessary to estimate the actual color present
in each pixel using information from surrounding pixels.
This process introduces artifacts that can negatively affect
color fidelity and the resolution of fine detail.
Triple-CCD cameras use a three-way beamsplitter and
three image sensors, but are expensive, bulky, and
susceptible to misalignment.
CRI’s tunable filter technology uses every pixel of a
monochrome image sensor to capture information from all
three red, green, and blue color states in rapid succession.
Depending on the bit-depth of the individual grayscale
images, merging the three color planes together will create
true 24-, 36-, or even 48-bit color images. No interpolation
routines are needed for getting accurate color, pixel-bypixel, and the image possesses maximum sharpness.
RGB color planes from
Micro*Color or Macro*Color
tunable filter
Each pixel
receives all
three colors
Each pixel
only receives
one color
RGB pixel
values
must be
inferred
Combined
RGB pixel
values
Figure 1. The Micro*Color and Macro*Color filters allow
you to take three images: one each in the red, green, and
blue color states. Every pixel contains uninterpolated, fullcolor information in the final merged image.
Thus, compromises in color fidelity, resolution, and cost
(for triple-CCD designs) are not necessary.
CRI, Inc.
35-B Cabot Road
Woburn, MA 01801
Tel: 781.935.9099
Fax: 781.935.3388
“Painted” pixels on
conventional color
image sensor
Toll-Free: 1.888.372.1242
Figure 2. Many conventional color cameras use a pattern
of “painted” pixels to produce a color image. Since each
pixel can only sample one color from the scene, software
interpolation is necessary to infer the values of the other
two colors from adjacent pixels. The result is compromised color and spatial fidelity.
e-mail: instrumentsales@cri-inc.com
Website: www.cri-inc.com
RGB Filters – Page 3
SPECIFICATIONS
COMPATIBLE SOFTWARE
LC filter aperture
20 mm (Micro*Color models)
35 mm (Macro*Color)
Computer interface1
Serial (COM), Parallel (LPT),
or TTL/Sync
Color States
Red, green, and blue (RGB)
Field-of-view
+/- 20-degrees off-axis
Wavelength range
Approx. 400 nm to 700 nm
Switching time
See Figure 3, below.
Maximum optical throughput
500 mW/cm2
Power for electronics box
110/220 VAC, 50/60 Hz
Operating temperature
10° to 40° C
Storage temperature
-15° to 55° C
2
Demo CRI Capture software
Windows 98/2000/XP
compatible
1
Cables and adapters are included for use with PCcompatible ports, as well as Macintosh-compatible serial
ports.
2
Third-party software packages are available with CRIcompatible drivers for image capture, display, and analysis.
See your authorized CRI distributor, or visit www.cri-inc.com
for more information.
Any program capable of controlling devices such
as microscope stages or filter wheels using serial
(COM) or parallel (LPT) signals can easily control
the Micro*Color and Macro*Color filters.
Many popular third-party image processing and
analysis programs have plug-ins or extensions
written to drive the Micro*Color or Macro*Color
filters. These include the following, who have
implemented image capture procedures utilizing
the RGB filter and compatible cameras:
AIS™ (Image Research, Inc.)
AnalySIS® (Soft Imaging System)
AQM (Kinetic Imaging, Ltd.)
Image™ (QED Imaging, Inc.)
ImagePro® Plus (Media Cybernetics®)
IPLab (Scanalytics, Inc.)
MCID™ Elite (Imaging Research, Inc.)
Metamorph® (Universal Imaging Corp.™)
Openlab (Improvision®)
Quantim (Zedec Technologies)
SimplePCI (Compix, Inc.)
COMPATIBLE CAMERAS
Micro*Color and Macro*Color filters are
compatible with a growing number of scientific
and industrial cameras such those manufactured
by:
Figure 3. The switching speed of the Micro*Color and
Macro*Color RGB tunable filter as it is cycled through
the red, green, and blue color states, and then back to
the red state.
Note that the filter can remain in any color for any
desired exposure time.
Apogee Instruments, Inc.
The Cooke Corporation
Eastman Kodak
Hamamatsu Corporation
QImaging
Red Lake MASD, Inc.
Roper Scientific, Inc.
CRI – INSTRUMENTS
Founded in 1985, Cambridge Research &
Instrumentation, Inc. (CRI) is a photonics
company and the leading provider of liquid crystal
based imaging technology.
Our Instrument Division (CRI – Instruments) offers
a broad array of tunable solid-state optical
components and modules for use in wavelength
selection, polarization optics, and light modulation
in digital imaging applications.
We also develop and manufacture highperformance instruments and systems that exploit
multispectral and polarized-light imaging and
detection for pharmaceutical drug discovery, life
science and clinical research, and industrial
process control.
CRI services a global network of distributors and
partners through direct sales of systems and
strategic alliances as an OEM supplier.
For more information contact
our Sales team at
E-mail: sales@cri-inc.com
TOLL-FREE (USA): 1.800.383.7924
DIRECT (Worldwide): +1.781.935.9099
CRI, INC. 35-B CABOT ROAD
WOBURN, MA 01801
All trademarks mentioned in this publication are the
properties of their respective owners. Micro*Color and
Macro*Color are trademarks of CRI, Inc.
Your local CRI agent or distributor is:
INSTRUMENTS
WWW.CRI-INC.COM
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