Tokyo Electronic CS8320B Manuel utilisateur

CCD Camera

CS8320B (EIA), CS83208C (CCIR)

Technical Manual

TOKYO ELECTRONIC INDUSTRY CO.,LTD.

CONTENTS

1. RESTART-RESET…………………………………………………………………………………………………… 9

2. Relation between the storage time and

the Image output at RESTART-RESET operation……………………………………………………. 9

3. Typical Examples of RESTART-RESET Operation………………………………………………….. 11

4. SPECIAL SHUTTER………………………………………………………………………………………………… 12

5. Image Output in RESTART-RESET Operation ………………………………………………………. 15

6. Explanation of internal selection switches………………………………………………………………... 16

NOTE

The falling pulse-phase of R.R pulse shall correspond to HD-falling phase or 1/2 HD

phase within ± 5 µ sec.

2. Relation between the storage time and the Image output at RESTART-RESET

operation

(1) RESTART operation

QSetting inside of the camera

CONTROL BOARD S4-3 ; ON

When RESTART-RESET operation, the signal stored during STORAGE A period can be output in the

period of IMAGING A as the below diagram.

- 9 -

1. RESTART-RESET

When normal external sync operation by HD-VD, the system cannot work normally without

consecutive VD every field (1V) as the below diagram.

QVD, at external SYNC operation by HD-VD

EXT VD

When RESTART-RESET operation, R.R pulse, can be fed with any timing as illustrated

with the below.

R. R

RESET

oint RESET

oint

QFRAME STORAGE MODE

RESET point

R. R

Ima

out

QFIELD STORAGE MODE

RESET

oint

R. R

Image

output

(2) Slow speed shutter operation

QSetting inside of the camera

CONTROL BOARD S4-3 ; ON

When slow speed shutter operation, the signal stored in STORAGE A period can be output

during the period of IMAGING A as the below diagram.

FRAME STORAGE MODE

Image

output

- 10 -

QFIELD STORAGE MODE

R. R

Image

output

3. Typical Examples of RESTART-RESET Operation

Random shutter operation, obtained one fame image, combined with RESTART-RESET and

strobe light.

QSetting inside of the camera

CONTROL BOARD S4-3 ; ON

The strobe light is flashed by R.R (reset point). And the signal stored while strode light flashed

can be obtained at IMAGING A and IMAGING B as the below diagram. Then, the frame image

can be obtained without waiting time.

QFRAME STORAGE MODE

RESET point RESET point

Strobe

light

Image

output

R. R

- 11 -

QFIELD STORAGE MODE

RESET point RESET point

R. R

Strobe

light

Image

output

4. SPECIAL SHUTTER

(1) Relation between VD and readout timing

Relation VD and readout timing (SO) in CS8320B/CS832OBC is as follows.

The rising point of SG pulse comes to the timing to make the electronic shutter close.

VD or

R. R

Model Scanning field T

1st field 614.2 µ sec.

CS8320B

2nd field 587.4 µ sec.

1st field 971.3 µ sec.

CS832OBC

2nd field 944.4 µ sec.

(2) Electronic shutter by shutter trigger

QSetting inside of the camera

CONTROL BOARD S4-4 ; ON

* In case of operation with RESTART-RESET it requires to set S4-3.

* When internal sync operation, HD/VD are fed from camera.

The electronic shutter opens from approximately 2 µ sec. after the shutter trigger pulse rises up,

and closes at the rising point of SG pulse. In this case, by feeding and controlling phase-

difference between the rising pulse of the shutter trigger and VD falling, X µ sec., it is possible

to set any shutter speed. At this time, the shutter speed is defined by X+T.

Combined with RESTART-RESET, variable random electronic shutter can be performed.

Shutter

trigger

VD or

R. R

SUB

NOTE

When the next trigger inputs, during one field period, active image period, right after

the shutter trigger, when image is output successively, sometimes, a scratch image

maybe occurred.

In that case, when the rising-phase of shutter trigger is in the active image period,

use to make the rising shutter trigger correspond with HD falling phase.

When only one field is output, it is possible to input with any phase.

- 13 -

(3) Typical example of SPECIAL SHUTTER

The method to make random shutter operation with frame image combined with

RESTART-RESET and SPECIAL SHUTTER

(But the image of the first field and the 2nd field is not the same time image.)

QSetting inside of the camera

S 4-3; ON

CONTROL BOARD

S4-4; ON

By feeding and controlling the rising phases of shutter trigger and R.R pulse, the signal to be

stored during STORAGE A is output at IMAGING A, and the signal stored during STORAGE B

is output from IMAGE B. Then, the frame image right after shutter trigger can be obtained

without waiting time.

QFRAME STORAGE MODE

RESET point RESET point

R. R

Shutter

trigger

Image

output

NOTE

When the next trigger inputs, during one field period, active image period, right after

the shutter trigger, when image is output successively, sometimes, a scratch image

maybe occurred.

In that case, when the rising-phase of shutter trigger is in the active image period,

use to make the rising shutter trigger correspond with HD falling phase.

When only one field is output, it is possible to input with any phase.

- 14 -

QFIELD STORAGE MODE

RESET point RESET point

R. R

Shutter

trigger

Image

output

5. Image Output in RESTART-RESET Operation

When RESTART-RESET operation in CS8320B and CS8320BC, V. SYNC and V.BLK are not

generated in the composite image signal right after R.R (reset point), one field period, but the

phase relation between reset timing (VD) and the image output does not change at all compared to

the normal operation.

QImage output in normal mode

hey are output from CCD,

but they are erased by V. BLK

Image

output

R. R

Image

output

.SYNC is generated.

QImage output right after resetting

Y. SYNC is ungenerated

- 15 -

CCD output as output, as it is

since V. VLK is un

enerated.

6. Explanation of internal selection switches

The internal stricture of this camera is as shown in the figure below.

QSide view after opening the camera cover

QMethod of setting the different modes

The different modes can be set using the switch S4 in the CONTROL board. The mode can be

selected by moving the DIP switches 1 to 6 to the left or the right position. Each

switch becomes OFF in the left position and ON in the right position.

At the time of shipment from the factory, all the switches will have been set to the left position.

Switch setting position

No. Function name

OFF ON

1 Gamma correction 1.0 0.45

2 CCD operation mode Frame store Field store

3 Restart-Reset OFF ON

4 Special shutter OFF ON

5 Not used ------------------- -----------------

6 VD/FLD output VD output FLD output

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