TCD1209 View Datasheet(PDF) - Toshiba

Part Name

Description

Manufacturer

TCD1209

CCD LINEAR IMAGE SENSOR CCD (Charge Coupled Device)

Toshiba 

TCD1209D

Note 9: Random noise is defined as the standard deviation (sigma) of the output level difference between two

adjacent effective pixels under no illumination (i.e. dark condition) calculated by the following procedure.

1) Two adjacent pixels (pixel n and n + 1) in one reading are fixed as measurement points.

2) Each of the output levels at video output periods averaged over 200 nanosecond period to get Vn and

Vn + 1.

3) Vn + 1 is subtracted from Vn to get. ∆V.

∆V = Vn−Vn+1

4) The standard deviation of ∆V is calculated after procedure 2) and 3) are repeated 30 times (30

readings).

∆V

=

1

30

30

∑

∆Vi

i=1

( ) σ =

1

30

30

∑

i=1

∆Vi

−

∆V

2

5) Procedure 2), 3) and 4) are repeated 10 times to get 10 sigma values.

σ

=

1

10

10

∑ σj

j= 1

6) σ value calculated using the above procedure is observed 2 times larger than that measured relative to

the ground level. So we specify the random noise as follows.

Random noise = 1 σ

2

5

2001-10-15

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