PR-920 Digital Video Photometer (DVP)

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Innovation

Photo Research developed the first commercially available video photometer over 15 years ago. We are proud to introduce our newest and most advanced video photometer - the PR-920 Digital Video Photometer (DVP). Our video photometers are being used world-wide for applications ranging from FAA testing of radar screens to ISO certification of information displays.

Digital Precision

The heart of the new PR-920 is a thermoelectrically cooled, 1024 x 1024 element digital CCD camera which helps to make it the most accurate, sensitive and repeatable video photometer in its class. Because the PR-920 detector consists of 1.048 million pixels, superior spatial resolution is guaranteed.

Hand Matched Filters

In addition to the proprietary camera design, the detector response of each PR-920 is painstakingly matched to the CIE V(l), (photopic) response by our proprietary filter matching techniques that have been developed over the last 50 years. Our filter matching experience, combined with an individual calibration of each and every detector element means that the PR-920 delivers the most accurate measurement results of any commercially available video photometer. In addition to the standard photopically matched filter, the PR-920 can be equipped with high-accuracy, hand-matched CIE Tristimulus filters (option CFS- 302).

Versatility

The PR-920 is the only commercially available video photometer that utilises a focusable objective lens as standard equipment providing capability of addressing virtually any application without change lenses. System versatility is further enhanced by 5 neutral density filters, giving the PR-920the widest measuring range of any video photometer available today.

Standard Equipment

System - Optical Head, PCI Frame Grabber, Cables

Optical Head - CCD Camera, Dual Filter Turrets (CIE Photopic and 5 Neutral Density filters), Camera Power Supply

Software- PanelWin™ or VideoWin™.

Calibration - Certified for 6 months Certification and Instruction Manual.

Options

CIE Tristimulus (Xr, Xb, Z) Filters (P/N CFS-302 or CFS-302C)

High Resolution Positioning Stages

PR-650 SpectraScan for Color Measurements (P/N CFS-302A)

Remote Control Software - Control VideoWin™ or PanelWin™ Macros from a Host PC over an RS-232 interface.

Absolute spatial calibration (line width, profile capability)

Controller - Pentium based PC running MS Windows, Monitor, keyboard and mouse.

Measurement Capabilities

Luminance

Luminance Uniformity and Profile

Pseudo Color Luminance Representation

Line Width, Profile (opt.)

CIE Chromaticity (opt.)

Convergence (opt.)

Modulation Transfer Function (MTF) (opt.)

Flicker (opt.)

Jitter (opt.)

Geometric Distortion (opt.)

PR-920 Lens Capability Chart

Objective Lens Magnification

Working Distance

Minimum Resolution

Minimum Measurable Line Width

Field of View Horizontal x Vertical

MS-60
@1:1 mag.

2.87 in.
(73 mm)

0.0005 in.
(0.012 mm)

0.002 in.
(0.06 mm)

0.48 x 0.48 in.
(12.2 x 12.2 mm)

MS-60
@ 1:2 mag.

4.72 in.
(120 mm)

0.0009 in.
(0.024 mm)

0.005 in.
(0.12 mm)

0.97 in.
(24.5 x 24.5 mm)

MS-60
@ 1:5 mag.

10.8 in.
(275 mm)

0.002 in.
(0.06 mm)

0.012 in.
(0.030mm)

2.42 in.
(61.4 x 61.4 mm)

MS-60
@ Infinity

0.7 min.
(0.20 mrad)

3.4 min
(0.99 mrad)

11.6 x 11.6 deg.
(202.5 x 202.5 mrad)

OL-2X
(2:1 mag.)

1.34 in.
(34 mm)

0.0002 in.
(0.006 mm)

0.001 in.
(0.03 mm)

0.24 x 0.24 in.
(6.1 x 6.1 mm)

OL-5X
(5:1 mag.)

1.34 in.
(34 mm)

0.0001 in.
(0.0025 mm)

0.0005 in.
(0.012 mm)

0.094 in.
(2.4 x 2.4 mm)

OL-10X
(10:1 mag.)

1.32 in.
(33.5 mm)

0.00005 in.
(0.0012 mm)

0.0002 in.
(0.006 mm)

0.047 x 0.047 in.
(1.2 x 1.2 mm)

OL-20X
(20:1 mag.)

0.79 in.
(20 mm)

0.00003 in.
(0.0007 mm)

0.0001 in.
(0.003 mm)

0.024 x 0.024 in.
(0.6 x 0.6 mm)

OL-50X
(50:1 mag.)

0.512 in.
(13 mm)

0.00002 in.
(0.0005 mm)

0.00005 in.
(0.0012 mm)

0.009 x 0.009 in.
(0.24 x 0.24 mm)

PR-920 Performance Specifications

Resolution:

CCD - 14 Bit
A/D - 16 Bit
CCD Pixel - 1024 x 1024

CCD Pixel Size:

12 mm x 12 mm

Standard Filters:

Photopic (f1' £ 3%), ND-0.2, 0.5, 1.0, 1.5, 2.0, OPEN

Variable Focusing Range:

12.3 cm to infinity with standard MS-50 Lens

Minimum Measuring Area:

³ 120 mm with MS-50 (see Lens chart)

Field of View

24.3 mm with standard MS-50 Lens (see Lens chart)

Measurement Time Range:

100 msec to 60 sec

Calibration Uncertainty:

± 5% (Absolute)
± 2% (Relative to NIST traceable 2856 K standard)

Luminance Precision:

± 0.25% at 0.3 cd/m² against 2856K standard (10x10 pixel avg.)

Linearity (f3):

£ 0.2% per ND filter position, £ 1% Overall (10x10 pixel avg.)

Polarization (f8):

£1%

Spatial Uniformity:

± 2% (10x10 pixel avg.)

Luminance Range (10x10 pixel):

0.01 to 85,000 cd/m²

Color Accuracy @ 0.3 cd/m² (10x10 pixel average):

± 0.0015 x, ± 0.001 y at 2856K- (CFS-302 option)
± 20 Kelvin meas. blackbody @ 2000K-3000K - (CFS-302 option)

Color Repeatability (10x10 pixel):

± 0.0008 for CIE x,y at 0.3 cd/m2, 2856K - (CFS-302 option)

Power Requirements:

90 to 240 VAC 50 - 60 Hz

Operating Temps. / Humidity:

5° to 30°C (41° to 86°F) / £ 90% Non-Condensing