The document describes a diaphanoscope, which is a device used to estimate the amount of red rice in seed samples. It works by using transmitted light to illuminate the internal structures of seeds placed on a glass surface. White rice appears translucent under the light, while red rice reflects light and appears darker. Seed analysts can then separate and count the red rice grains to express the percentage of red rice contamination or the number of red rice per kg of the seed sample. The diaphanoscope provides an efficient way to examine seed samples and estimate red rice content.

1. S.KANNAN &
SENIOR AGRICUTURAl OFFICER
SEED TESTING LABORATORY
THIRUVARUR,TAMILNADU
M.P.PRABAKAR
SEED TESTING OFFICER
SEED TESTING LABORATORY
THANJJAVUR,TAMILNADU
DIAPHNOSCOPE FOR RED RICE ESTIMATION

2. DIAPHNOSCOPE
An instrument for
illuminating the interior of
body cavity to determine
the translucency of its
walls.

3. PURPOSE AND
SCOPE
Designed for testing
the red rice of seed
samples on its optical
properties With
maximum comfort and
efficiency.

4. DESCRIPTION
The principle of trans-
illumination is based on the
varying ability of vitreous and
mealy grains pass luminous
flux, i.e. difference in their
optical properties.

5. USAGE
Diaphanoscope provides a
convenient work area on smooth
glass surface for seed and grain
analysis. A light placed under and
shining through the glass assists in
critical examination of the sample.
Used by grain inspectors and seed
analysts.

6. ESTIMATION OF RED RICE
Diaphanoscope is an inspection device
with an opaque glass or plastic surface
positioned over a small opening
providing a light source from below.
The light provides a view of the
internal seed structure of seeds which
are thin or translucent enough to allow
the light to shine through them

7.  spread the paddy seed samples over the glass
surface
 switch on the light
 The white rice allows the light through them and
appears translucence and whitish.
 The red rice which reflects the light source and
darkness is appeared in the seed structure and
in some time the reddishness is observed in the
internal view through the lemma and palea.
 Separate the red rice by forceps and count the
Numbers

8. RED RICE IN THE PADDY SEED
SAMPLE IS EXPRESSED IN
EITHER AS
PERCENTAGE
or
NO/KG

9. DIAPHANOSCOPE

10. Diaphanoscope is also used to
separate inert matter such as
florets lemma,palea ,awns
and caryopsis from paddy seed
sample which in turn u.sed to
calculate Physical Purity of seed

11. THANK
YOU