DermLite DL3™ Pocket Epiluminescence Device
Prior to using the DermLite DL3, read these instructions and keep them in a safe place
for future reference.
United States Federal Law restricts this device to sale by or on the order of a physician.
The DermLite DL3 is designed for external examination only.
DermLite DL3 is a camera-compatible pocket epiluminescence
microscopy device designed to view skin lesions with high
magnification and clarity.
Two sets of LEDs (light emitting diodes) can be activated
independently; one set of 21 LEDs provides glare-free, crosspolarized light by canceling the reflected light from the
skin, whereas the other set of 7 LEDs provides non-polarized
light for traditional immersion fluid dermoscopy. A high
quality, four-element, 25mm, 10x lens with superb color
correction and reduced image distortion produces an image
rich in surface detail.
To facilitate the use of immersion fluids, and allow for fixed
digital imaging, the unit is equipped with a retractable
Directions for Use
CAUTION: Do not look directly into the bright LED light.
Patients must close their eyes during facial examinations.
IMPORTANT: Before initial use, please charge the internal
lithium ion battery for a minimum of 4 hours using the
charging base provided. See "Charging" for details.
1/8” | 3mm
Hold your DL3 so that the LEDs are aimed in the direction
of the lesion to be examined. Place the device approximately
1" (~25mm) from the skin. Push and hold the power button
(A) at the left side of the unit for approximately 1 second
to turn on the cross-polarized mode. The same button lets
you toggle between two sets of LEDs. Each time the device
is turned on, the cross-polarized set is automatically
activated. A quick tap of the button enables the non-polarized
mode for immersion fluid dermoscopy, another tap toggles
back to the cross-polarized illumination.
Look through the lens with your eye placed 1"( ~25mm) to
4" (~100mm) above your DermLite. Move the device closer
or further away from the skin to obtain the desired image
focus. For oil immersion imaging, or for camera use, rotate
the spacer dial (B) clockwise so that the large silver marker
(C) is at the 12 o’clock position. For fine focusing, simply
rotate the dial to the left or right; note that each mark
indicates a 1mm change in spacer distance. To turn off your
DL3, push & hold the button for approx. 1 sec.
CAUTION: If your DermLite is used for oil immersion imaging,
place the oil only on the skin and then place the extended
faceplate spacer on top of the oil. Do not allow oil to
contact the charging contacts or battery compartment.
Removing the Spacer
Firmly grasp and pull the spacer dial (B) down by about
1/8" or 3mm (fig. 1 & 2). Rotate the spacer dial's RED dot
to the 12 o'clock position (fig. 3). Lightly pull on the spacer
itself and rotate it about 15 degrees until its three pins can
slide through three notches (D) in the spacer dial (fig. 4).
To replace the spacer, make sure the spacer dial is pulled
down and its red dot is turned to the 12 o'clock position.
Slip the spacer's three pins through the three notches and
rotate the spacer until you can push it in slightly. Gently
rotate the spacer dial until the spacer is being pulled back
in. Lastly, push the spacer dial back up.
To reduce internal reflections and improve the contrast of
the image, attach the optional eyepiece onto the 28mm
To enable you to attach your DL3 to a camera, the device
is equipped with a 28mm thread (E). A simple ring adapter
(such as a 28-37mm stepping ring) may be all that is
required to adapt the device to your camera of choice,
although many cameras require a special adapter made by
the camera manufacturer or a photography supply company.
Prior to taking images, wipe the faceplate (F) clean and
extend the spacer to the 12 o'clock position. Generally,
good images may be obtained by setting your camera to
automatic or "P" mode, activating the "macro" function,
and deactivating the flash. Please contact 3Gen or your
camera dealer for more information.
Cross-Polarization setting power button
Linear Polarization setting power button
Attention, consult accompanying document
Do not dispose as unsorted municipal waste
DermLite and 3Gen are registered trademarks of
3Gen, LLC • 31521 Rancho Viejo Road Suite 104 • San Juan Capistrano, CA 92675 • U.S.A.
Tel. +1.949.481.6384 • Fax +1.949.240.7492 • E-Mail: info@3GenLLC.com • www.dermlite.com
©2009 by 3Gen, LLC • All rights reserved. • REF A LT100-0023
3Gen Patents Include:
7,006,223 (Dermoscopy Epiluminescence Device Employing Cross and Parallel Polarization)
7,167,243 (Dermoscopy Epilumination Device Employing Cross and Parallel Polarization)
EC Representative (EU Only)
M. Devices Group,
Marlborough House, Riding Street,
Southport, PR8 1EW, UK.
Tel: +44 1704 544 944 Fax: +44 1704 544 050
Prior to using the DermLite, insert the 110V-220V power
plug into an electrical outlet and the other end into the
back of the charging base. Set the base on a level surface.
Place the DermLite onto the base, and the "3" will illuminate
red to indicate that the DL3 is being charged. When the
lithium-ion battery is fully charged and either in its base or
outside its base and powered on, the "3" glows green and
the device will allow up to 2 hours of continuous operation,
or enough power for imaging approximately 600 lesions at
30 seconds per examination. If less than 25% battery life
remains, the "3" will turn orange.
After approximately 1,000 charges, the battery’s capacity
will diminish and the battery may need to be replaced. To
remove the battery, slide the rubber handle (G) back and
completely off the device. Disconnect the small white battery
plug and remove the battery. Insert a new battery and
reconnect the battery plug. Replace the battery door securely
on the device.
CAUTION: Your DL3 uses a special lithium-ion battery, which
can only be purchased from 3Gen or from an authorized
3Gen dealer. Do not under any circumstances use another
battery other than the one designed for this unit. Doing so
could result in damage to the unit. Also, do not under any
circumstances use another charger other than the one
supplied with the unit.
Using the Lanyard
CAUTION: Lanyards pose a strangulation risk. Use with
Run the short, thin portion string through the eyelet (H)
located at the end of the device. Feed the other end of the
lanyard through the loop made by the thin string (I). Separate
the DermLite from the laynard by squeezing the snap
Please check our website (www.dermlite.com) for the most
current troubleshooting information. If your DermLite requires
servicing, please go to the "Service & Support" pages at
www.dermlite.com, where you can complete a "Repair
Request" form. Or, contact your local 3Gen dealer.
Fully recharge the battery and check again. If the condition
persists, your DermLite may require servicing.
The LEDs used in your DermLite are designed to last over
100,000 hours. If any one of the LEDs fails, your DermLite
Please contact 3Gen to arrange for service.
Care and Maintenance
Your DL3 is designed for trouble-free operation. There are
no adjustments to be made nor is any special servicing
required. Never attempt to open the device for any reason.
Cleaning and Sterilization
The exterior of your DermLite may be cleaned or disinfected
by wiping it with Isopropyl alcohol (70% vol.). Do not use
alcohol or disinfectants in the optical areas of the unit. Do
not use abrasive material on any part of the equipment or
immerse the device in liquid. Do not autoclave.
Cleaning the Lens and the Polarizers
The lens and the polarizing filters should be treated as high
quality photographic equipment and should be cleaned
with standard lens cleaning equipment and protected from
DermLite DL3 components include:
Twenty-seven 3mm white LEDs, four-element 25mm lens
with 10x magnification, cross-polarized and non-polarized
illumination, retractable faceplate spacer with 10mm scale,
lithium-ion battery, 28mm eyepiece, lanyard
5 years for parts and labor.
Serial number and company information are located inside
the battery compartment.