This is our small engineering services company

1. Princeton Scientific Instruments, Inc.
Princeton Scientific Instruments, Inc. www.prinsci.com
7 Deer Park Dr, Monmouth Junction, N.J. 08852 Ph: 732-274-0774

2. PSI History
Princeton Scientific Instruments is a small, dynamic company engaged in mechanical,
electrical, electronic, software engineering services and research. We have a core group
of employees responding quickly to changing customer demands and a bullpen of
scientists and engineering consultants available to us. PSI has been in business more
than 30 years, originally focused on developing CCD cameras for scientific use. Over the
years we have branched out into areas involving electro-optical systems. Customers
include commercial, government and academia.
Customers have included :
• Air Force • Navy
• Army • Princeton Plasma Physics Laboratory
• BANC3 • Princeton Power Systems
• DARPA • Princeton University
• Department of Energy • Sarnoff/SRI
• General Dynamics • Sci-in Tech
• Johnson and Johnson • Sensors Unlimited
• National Institute of Health • University of Arizona Lunar and Planetary Laboratory
• NASA
Princeton Scientific Instruments, Inc. www.prinsci.com 2
7 Deer Park Dr, Monmouth Junction, N.J. 08852 Ph: 732-274-0774

3. PSI Capabilities
 Electronic Circuit Design  Assembly
• Spice Simulation • In house or subcontract
• Orcad Schematic Capture • Electronic
• PCB (Printed Circuit Board) Layout • Electrical
• Analog - amplifiers, filters • Mechanical
• Digital – FPGA, Microcontrollers • Optical
 Software  Selection, Coordination and Supervision of
• LabVIEW™ for Data Acquisition & Control • Machine Shop, Full CNC machining capabilities
• Microcontroller coding • Plating, Anodizing, Hard Coat and Powder Coat
• Screen printing and Laser Marking
 Mechanical Design and Drafting
• CAD ( Computer Aided Design )  Vacuum System experience
• 3D Modeling • CCD dewars
• 2D Mechanical Drawings
• Artwork for screen printing and laser marking
Temperature chamber
• Temperature range -30 to 100 C
 Optical interface & integration
• Filter, Lens, beam splitter selection
• Photo detectors, LEDs, Lasers
Princeton Scientific Instruments, Inc. www.prinsci.com 3
7 Deer Park Dr, Monmouth Junction, N.J. 08852 Ph: 732-274-0774

4. Projects for a recent Customer
We were tasked with packaging and integration of laboratory instruments and/or designing
new instruments by a customer in the skin care product industry. The skin measurement
instruments we have been involved with over the past 2+ years are:
• Diffuse Reflectance Spectrometer (DRS) - Visible light reflectance/absorption
• Compact Diffuse Reflectance Spectrometer (CDRS)
• Fast Diffuse Reflectance Spectrometer (FDRS)
• Spectrofluorometer (SFM) - Fluorescence by exciting the skin in one wavelength
and measuring the resulting fluorescence in a different wavelength
• Skin Displacement Instrument (SDI) - Skin softness by blowing air on the skin and
measuring the displacement with a laser measuring system
• Reviscometer (RVM) - Speed of sound through skin
• Dielectric Properties of Skin (DPSI) - Skin resistance
• Macro Skin Fluorescence Imaging Probe (MSFIP) – Fluorescence microscope
• Multichannel Clinical Imaging System (MCCIS) - Facial DRS
PSI designed, assembled, modified and tested the systems in house.
Princeton Scientific Instruments, Inc. www.prinsci.com 4
7 Deer Park Dr, Monmouth Junction, N.J. 08852 Ph: 732-274-0774

5. Diffuse Reflectance Spectrometer (DRS)
Instrument Description: Used to measure reflectance, absorbance and transmission of Visible light
on the skin. Thermo Electric Cooled (TEC) CCD spectrometer, quartz light source.
Custom Bifurcated Fiber Optic Probe Instruments delivered with laptop and
installed software. Project Disciplines: Packaging, Software, Wiring, Mechanical assembly
3D Cad Model
Electro-Mechanical Packaging
5
2D Machining drawing Final Product

6. Diffuse Reflectance Spectrometer (DRS)
Wiring Diagram
Software Main Screen with
Spectrometer output looking
at fluorescent room light
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7. CDRS (Compact Diffuse Reflectance Spectrometer) Optical Funnel version
Instrument Description: Replace the Quartz Halogen Lamp with 4 LED’s and the spectrometer with
Silicon detector used in the DRS instrument
Project Disciplines: Packaging, Mechanical Design, Electrical design, Software, Wiring, Mechanical
assembly
Simplified Block Diagram
Optical Funnel cut-away view
Optical funnel
SMA optical connectors
Silicon Detector
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3D Cad Model Printed Circuit Board

8. CDRS (Compact Diffuse Reflectance Spectrometer) Optical Funnel version
Software: Uses the public domain DRS Algorithm to calculate Oxy Hb, Deoxy Hb, Melanin
and Scattering using the 4 LEDs. Software operates by turning each of the LED’s on in
sequence then recording the reflected spectra with an off the shelf DAQ module. Data is
recorded to a text file.
Screen shot of the CDRS software, with strip Led Single values popup window
chart recording
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9. FDRS (Fast Diffuse Reflectance Spectrometer)
This instrument is comprised of a Princeton Instruments spectrometer and can acquire spectra at
~100 frames per second. In addition to performing the same calculations as a DRS, the higher
speed acquisition can also detect lymphatic oscillations occurring at ~10Hz. This project
consisted mainly of customizing software developed for the Spectrofluorometer.
FDRS Instrument Picture
FDRS screen shot of software
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10. SFM (Spectrofluorometer)
This system is used to measure fluorescence of the skin, and is comprised of a
monochromator, spectrometer, 2 filter wheels and a Xenon Light source. The project involved
packaging and some software modifications in LabVIEW.
Screen shot of
the software
looking at a
fluorescent room
Front and rear picture of the light
Spectrofluorometer system
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Spectrofluorometer optical path

11. RVM (Reviscometer)
3D Frame
This project is a modification to an existing instrument
made by Courage + Khazaka electronic GmbH. This
probe uses 2 Piezo transducers, one as a transmitter and
the other as a receiver, in order to measure the speed of
sound through the skin. The original instrument required
the user to manually move the probe. PSI automated the
system by putting the probe in a housing with motors to
provide the required movements.
Frame and components
Assembled Probe
adapter housing
Machined from a
STEP file
11
2D Machining drawing

12. RVM (Reviscometer)
This project is a modification to an existing instrument made by Courage + Khazaka electronic GmbH. This
probe uses 2 Piezo transducers, one as a transmitter and the other as a receiver, in order to measure the speed
of sound through the skin. The original instrument required the user to manually move the probe. PSI automated
the system by putting the probe in a housing with motors to provide the required movements.
Screen Shot of a typical
Gaussian measurement
System Block Diagram
12

13. DPSI (Dielectric Properties of Skin Instrument)
A lab instrument for
development of customized
sequence steps for VI
characterization of the skin.
Sequences can produce
ramp up, ramp down, or DC
voltages.
The left plot is an Up / Down
ramp demonstrating
characteristic hysteresis of
the skin. The right plot is a
Hysteresis plot DC Step test 1V – 0V using
a test probe with a 500KΩ
resistor and a .1uF capacitor
in series.
This device uses a lab power
supply, capable of delivering
200V at >50mA, therefore a
protective interface was
designed to trip if current or
voltage exceed safe levels.
13
DC Step test with RC Test probe

14. MSFIP (Macro Skin Fluorescence Imaging Probe)
This project uses 3 Visible Lasers and a quartz Halogen visible light source along with a filter
Wheel, shutter, and video camera. Laser beams are confined in fiber optic cables and are
routed through an optical switch. An interface board was designed to control the functions of
the devices and to provide a Watch Dog Timer for safe laser operation.
Screen Shot imaging a Fluorescence Reference under a transparent grid through a 620nm
14nm FWHM filter 14

15. MSFIP (Macro Skin Fluorescence Imaging Probe) block Diagram
15

16. MCCIS (Multi Channel Clinical Imaging System) A packaging project
3D Cad views
Assembled product
16

17. Dynamic Muzzle Reference System
3D CAD Modeling
A system for measuring the bending of a tank barrel
Receiver
Unit
Assembly
Receiver Unit
Housing
Emitter Optical Tube
Prism Housing Machined from 2D Drawings 17

18. Dynamic Muzzle Reference System
Receiver Electronics Unit
Receiver Unit
Emitter Unit
Prism
18

19. Laser Hazard Detector System
Assembled system Video Processor PC board
• Visible to Near IR Laser Detection
• Intensity, Wavelength, origin angle, Pulsed or CW
19

20. FLEET (Femtosecond Laser Electronic Excitation Tagging)
This project involves a collaboration with Princeton University (http://www.princeton.edu/mae/ )
Femtosecond Laser Electronic Excitation Tagging (FLEET). This method of tagging the
exhaust stream of a jet engine requires no seeding of the gas flow. The laser induced
fluorescence is imaged downstream, and the distortion of the laser line can be used to find the
velocity profile of the flow. Our fast camera technology is used to provide multiple downstream
images with a single data acquisition. Our website has some videos of other fast camera
applications. Measurement of turbulent structure in the exhaust of an F-35 for the study of
noise generation and control.
From Professor R. Miles Princeton University PSI Fast Camera 20

21. Astronomy Telescope Shutter Controller
Sci-in Tech (www.sciin.com) makes large
aperture photometric shutters for use in
astronomy. These shutters are in use at
various telescopes around the world. An
embedded micro-controller provides the
triggering and timing control to the motors
that drive the shutter blades. See the
website for more information.
Electronic and Mechanical packaging
Black Anodizing and Laser Marking Printed Circuit Board Design and Assembly
21

22. Princeton Scientific Instruments, Inc.
7 Deer Park Drive
Monmouth Junction, NJ 08852
Ph 732-274-0774
Fax: 732-274-0775
Email: glemunyan@prinsci.com
Princeton Scientific Instruments, Inc. www.prinsci.com 22
7 Deer Park Dr, Monmouth Junction, N.J. 08852 Ph: 732-274-0774