Biometrics
Tiny focus modules enable faster, more accurate detection
systems
In biometric applications such as facial recognition and
iris scanning, auto focus provides increased field of focus
for rapid capture at variable distances. This enables faster, less
obtrusive detection systems with very high accuracy.
Dynamic focus also allows both wide field and macro imaging, enabling
multi-function cameras that can image facial features, capture
video, read barcodes and scan fingerprints with a single device.
New Scale provides production-ready solutions for this market based on our
patented piezoelectric motor and related technology. We partner with
leading sensor and lens providers to deliver complete solutions from
product development through high-volume production.
M3-F Focus Modules
M3-F focus modules are configurable, fully-integrated closed-loop
actuators that mount directly on a camera PCB. They easily replace
fixed-focus lens holders on miniature board cameras, without adding
system size or weight. With very low power requirements, they are
ideal for handheld and portable systems.
Modules are production-ready, and with our developer's kits you
can have an evaluation board up and running in minutes.
- Configurable for lenses from M6 to M12
- Compatible with common image sensors including 1/2" and
1/1.8" format
- Size approximately 20 x 22 x 16 mm
- Resolution 0.5 µm, accuracy better than 30 µm
- Step and settle
time < 20 ms for a 30 µm step.
Based on New Scale’s M3 design platform, each M3-F focus module incorporates a piezoelectric SQUIGGLE micro motor,
motor drive ASIC, position sensor and microprocessor. The modules
accept high-level digital commands via standard serial interface
(I2C or SPI). No external control board is necessary.
M3-F modules have low power consumption and maintain focus
position during power-off. They use a 3.3V input voltage for
battery-powered operation.
M3-F modules have smaller size, higher resolution, and lower
power use than traditional stepper motors. They are less expensive,
afford more flexibility and are easier to integrate than liquid
lenses.
New Scale can quickly configure modules to fit your lens,
mounting interface and macro and infinity image plane locations.
Application-specific M3-F focus modules
New Scale also customizes M3-F focus modules to specific OEM
requirements, simplifying system integration. Starting with our
standard M3 platform (SQUIGGLE motor, driver and encoder)
components, we can very quickly deliver an application-specific M3-F focus module
that has:
- custom housing for mechanical fit
- custom size to fit your specific lens and sensor
- custom microcontroller
- ability to meet extreme system use and abuse requirements
- extended temperature range
- modifications to meet your other unique requirements
M3-F focus module system diagram
Figure 1 shows the M3-F focus module. The module mounts on the
OEM’s camera PCB, over the image sensor.
