D4212829A
2
Copyright © 2012 TOSHIBA TELI CORPORATION, All rights reserved.
http://www.toshiba-teli.co.jp/index.htm
1 Overview
In order to meet the request from customers, this BG B/W series are pursued ultra-compact and a high
frame rate.
However, since the surface area of this camera is small, the heat radiation capability of this camera is
small. Therefore, in a customer's usage environment, it is necessary to radiate the heat of this camera
by thermal radiation, thermal conduction, and convection.
This document instantiates the data for help of a heat radiation design with a customer's machine and
equipment.
2 Specifications
Operation Ambient conditions
Operation assurance Temperature: 0°C to +40 °C, Cam era housing temperature: less than 50 °C
Humidity: 10% to 90% (no condensation)
Notes on Heat Radiation:
The temperature of camera housing must be kept less than 50 °C.
Please provide sufficient heat radiation depending on your installation.
D4212829A
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Copyright © 2012 TOSHIBA TELI CORPORATION, All rights reserved.
http://www.toshiba-teli.co.jp/index.htm
3 The heat radiating route
The heat radiating route from this camera is Fig. 1.
The heat radiating model of Fig. 1 is shown in Fig. 2.
Ambient temperature [ ℃ ]
Lens Cables Fixed unit
Case temperature [ 50℃ max ]
Inner component
CCD Camera
Ta
Tc
Tcom
Rcam
Rcam : Thermal resistance inside the camera [℃/W]
Rth : Thermal resistance between the camera and environment [℃/W]
Tcom : Inner component temperature [℃]
Tc : Case temperature of the camera [℃]
Ta : Ambient temperature [℃]
Rth
Fig2. Heat radiating model
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Copyright © 2012 TOSHIBA TELI CORPORATION, All rights reserved.
http://www.toshiba-teli.co.jp/index.htm
4 Heat radiation concept
4.1 Lens
By using a lens with large surface area, the heat is conducted from the camera to the lens, and the
heat radiation capability improves.
4.2 Cable
By using the shielded cable which strengthened frame GND, the heat is conducted from the
camera to the cable, and the heat radiation capability improves.
4.3 Camera fixed unit
By using a camera fixed unit with large surface area, the heat is conducted from the camera to the
camera fixed unit, and the heat radiation capability improves.
Moreover, by using the camera fixed unit painted black, the heat radiation capability improves.
4.4 Convection
By circulating the air of the ambient environment of a camera, the heat radiation capability
improves.
5 Heat radiation example
Examples measured at our company are shown below. These examples were measured under PoE
power supply.
Camera specification can be satisfied under example conditions.
5.1 Example 1
< Heat radiation conditions >
- Lens : C-mount lens (16mm) *Outside dimension = Φ29mm x L33mm
- LAN Cable / Camera Cable
- Camera fixed unit : Aluminum plate (no paint)
*Outside dimension = H110mm x W110mm x D8mm
- Other : Without air convection. The aluminum plate was installed on the stand without heat
radiation capability.
Camera mode Power consumption Rth Tc Ta
All pixel readout （SXGA 30fps) 3.8W 3.4℃/W 50℃37℃
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Copyright © 2012 TOSHIBA TELI CORPORATION, All rights reserved.
http://www.toshiba-teli.co.jp/index.htm
5.2 Example 2
< Heat radiation conditions >
- Lens : C-mount lens (16mm) *Outside dimension = Φ29mm x L33mm
- LAN Cable / Camera Cable
- Camera fixed unit : Aluminum plate (Black paint)
*Outside dimension = H120mm x W180mm x D10mm
- Other : Without air convection. The aluminum plate was installed on the stand without heat
radiation capability.
Camera mode Power consumption Rth Tc Ta
All pixel readout （SXGA 30fps) 3.8W 2.8℃/W 50℃39℃
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