Foldscope introduction and application by dr.ch.tulasi

Foldscope – Introduction &
Applications
19-05-2019 Dr.Ch.Tulasi, GCW(A), Guntur 1
Dr.Ch.Tulasi, Department of Zoology
Government College for Women (A)
Guntur, Andhra Pradesh

Vorticella Feeding

Parameter Compound
Microscope
Foldscope
Portability Not easy to carry Easy to carry
Maintenance Required, fungus
accumulates
No need, clean the lens
No. of Lenses more Single
Magnification 100X, oil immersion 140x
Attachability to
mobile phone
No feature Easy to take pics and
videos

5
“In my mind, every Biology book should have
a Foldscope as the last page, Because you’re
not just imparting knowledge, you’re also
imparting the tools to gain that knowledge”
Manuprakash

A Foldscope is an optical microscope that
can be assembled from simple
components, including a sheet of paper,
Magnetic couplers and a lens.

• The Foldscope was developed by a team led by
Manu Prakash, an Assistant Professor
of Bioengineering at Stanford School of
Medicine
• The idea for creating a low-cost microscope
came to Prakash in 2011 while he was at a field
station in Thailand
• He remarked that the station had a very
expensive microscope but that everyone was
afraid to use it because it was fragile and worth
more than most people's salaries.

• He wanted to create an affordable
microscope that would be versatile
and sturdy enough to work in field
conditions

• A device that people feel they had
ownership of, that’s the reason the
Foldscope comes in a kit to be
assembled.
• He developed the first prototype in
2014

• A Foldscope can be assembled from a
punched sheet of cardstock, a spherical
glass lens and few Magnetic couplers.
• a Light Emitting Diode along with battery
that powers the LED is an accessory.
• Once assembled, the Foldscope weighs 8
grams and comes in a kit that provide
magnification at 140X.

• Those who received the Foldscope kits
were encouraged to share their
experiences using the microscope on a
website, Microcosmos, so that Prakash's
team could see how people could use
the Foldscope.

Foldscope’ Journey: travelling rapidly around
the world, in the hands of scientists, medical
workers, students, teachers and even people
outside the scientific community.
The device is in constant evolution: recent
improvements allow for dark-field microscopy
(visualizing objects against a black background)
and bright field microscopy (imaging objects
against bright light); it now features focus-
locking mechanisms

Individual Bacteria

Where you can use this
Your curiosity
&
Observe Microcosmos

Bacteria in Panipuri Water

Bacteria in DrainageWater

Amoeba Feeding

Paramecium – Osmoregulation

Aelosoma

Bdelloid Rotifer

How to Use it

Preparation of Slide
• Normal Slide and cover with Coverslip-
water drop, microorganisms, pollen,
leaf, root sections etc.
• Cavity Slide for little bigger & living
ones– Ant, drosophila, Cyclops, Moina,
Head lice,

Collecting dust from Air

Collecting Pollen

Light Sources
1.Natural sun light
2.Foldscope LED light
3.SmallTorch light
4.Cell phone light
5.Table Lamp
6.Any artificial light
7.Need to adjust the intensity of the light

Light Sources

How to change angle of Light
Adjust position of the foldscope and change the angle of Light

How to change angle of Light
If it is table lamp by increasing and decreasing
the distance between light source and foldscope

How to Attach to mobile
Stick Magnetic
coupler (black
colour should
face you) around
the camera with
ring sticker

How to Project the image
Stick Magnetic
coupler (Silver
colour should
face you) around
the mobile torch
light with ring
sticker

Measurement of Size
1 mm 0.5 mm
@ 140x without magnification

How to
Assemble
Foldscope

Dr.Ch.Tulasi
Department of Zoology
Govt. College for Women(A), Guntur
anantha.tulasi@gmail.com
5/19/2019 Dr.Tulasi, GCW(A), Guntur 59

Foldscope introduction and application by dr.ch.tulasi

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