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New Generation EXview HAD CCD Ultrahigh-Sensitivity Near Infrared Structure Diagonal 6 mm (Type 1/3) 380K/440K-Effective Pixel CCD Image Sensors
ICX658AKA(NTSC), ICX658ALA(EIA) ICX659AKA(PAL), ICX659ALA(CCIR)
Higher sensitivity is a never-ending theme, especially in image sensors for surveillance cameras. Until now, to respond to these needs, Sony has provided a lineup of EXview HAD CCD image sensors that displayed the industry's top level of sensor sensitivity. Sony has refined this EXview HAD CCD technology even further and has succeeded in developing technologies that improve sensitivity, especially sensitivity in the near infrared, significantly. Now, Sony has developed the ICX658/659 image sensors that adopt these leading edge Sony technologies as CCD image sensors for surveillance cameras, especially day/night cameras.
I I Diagonal 6 mm (Type 1/3) Near infrared sensitivity: +4.5 dB higher than earlier Sony products at the 950 nm wavelength Excellent compatibility with earlier Sony products I
*: EXview HAD CCD is a trademark of Sony Corporation.
The ICX658AKA/659AKA and ICX658ALA/659ALA (ICX658/659) are diagonal 6 mm (Type 1/3) 380K/440Keffective pixel color and B/W CCD image sensors developed for use in surveillance cameras. The ICX658/659 image sensors were developed with the particular goal of increasing the near infrared sensitivity. It is in day/night cameras that the ICX658/ 659 can exhibit the true value of their high near infrared sensitivity. Furthermore, these image sensors are ap-
propriate for imaging with LED and other near infrared light sources. See table 2 for a comparison of imaging characteristics.
High Near Infrared Sensitivity
In the ICX658/659, Sony improved on the conventional photodiode and developed a structure with an even higher photoelectric conversion efficiency. This structure succeeds in capturing even more of the near infrared region light that escapes to the substrate side in normal CCD image sensors. The result is that the existing EXview HAD CCD technology, which had the industry's top level of high sensitivity for surveillance CCDs has been evolved even further, and these devices feature increased sensitivity not only to visible light, but in the near infrared region as well. Compared to Sony's conventional ICX258/ 259 products, the ICX658/659 achieve increased sensitivities of +10% in the visible range, and +4.5 dB in the near infrared (wavelength: 950 nm). (See photograph 1.) We hope the ICX658/659, which can make effective use of the near infrared light invisible to the human eye, will make new applications possible in the image sensing field. Figure 1 presents a comparison of the
ICX658/659 spectral sensitivity characteristics and figure 2 shows the spectral characteristics of the increases in sensitivity provided by the ICX658/659 with the ICX258/259.
Excellent Compatibility with Conventional Sony Products
The ICX658/659 were designed to minimize as much as possible any difficulties in their use as replacements for the ICX258/259. In particular, the image size, pixel counts, recommended drive timings, pin configuration, and package are all identical. (See table 1.) We strongly recommend that customers currently using the ICX258/259 look into the performance of the new generation EXview HAD CCD ICX658/659 image sensors.
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The performance of the CCD image sensors used in monitoring applications is directly linked to the performance of these crimeprevention cameras. Thus I found this a rewarding development effort, since it may lead to a social contribution in improved crime prevention. I was just one of the many people involved in this project. I strongly urge that you take advantage of the superb performance of the ICX658/659, which incorporate the enthusiasm and spirit of many of us here at Sony.
* Imaging conditions LED illumination in completely dark room * LED specifications Wavelength: 950 nm, Half width: 25 nm Illumination distance: 1 m
Conventional product (ICX258/259)
Newly-developed product (ICX658/659)
I Photograph 1 Image Comparison
Ye Mg
0.8
ICX658
Sensitivity increase (ICX658 sensitivity/ICX258 sensitivity)
1.0
1.8
Relative sensitivity
1.6
Cy
0.6
G
ICX258
1.4
0.4 0.2 0.0 400
1.2
500
600
700
800
900
1000
1.0 400
500
600
700
800
900
1000
Wavelength [nm]
Wavelength [nm]
I Figure 1 Spectral Sensitivity Characteristics Comparison
I Figure 2 Spectral Analysis of the Increased Sensitivity
I Table 1 Device Structure Comparison
Item Image size TV format Transfer method Total number of pixels Number of effective pixels Number of active pixels Chip size Unit cell size Optical Horizontal black Vertical Number of dummy bits Horizontal drive frequency Package ICX258AK/AL Diagonal 6 mm (Type 1/3) NTSC/EIR Interline transfer Approx. 410K (811H x 508V) Approx. 380K (768H x 494V) Approx. 370K (754H x 485V) 6.00 mm (H) x 4.96 mm (V) 6.35 m (H) x 7.40 m (V) Front: 3 pixels, rear: 40 pixels Front: 12 pixels, rear: 2 pixels Horizontal: 22 Vertical: 1 (Even fields only) 14.3182 MHz 16-pin DIP (Plastic) 14.1875 MHz 6.50 m (H) x 6.25 m (V) Approx. 470K (795H x 596V) Approx. 440K (752H x 582V) Approx. 420K (738H x 575V) PAL/CCIR ICX658AKA/ALA ICX259AK/AL ICX659AKA/ALA
I Table 2
Color Products
Item Sensitivity (F5.6) Saturation signal Smear (F5.6)
Imaging Characteristics Comparison
ICX258AK 1100 mV 1000 mV -115 dB ICX658AKA 1200 mV 1000 mV -115 dB Improvement
+0.8 dB
At a wavelength of 950 nm +4.5 dB
Equivalent to above Equivalent to above
B/W Products
Item Sensitivity (F8) Saturation signal Smear (F8) ICX258AL 1000 mV 1000 mV -115 dB ICX658ALA 1100 mV 1000 mV -115 dB Improvement
+0.8 dB
At a wavelength of 950 nm +4.5 dB
Equivalent to above Equivalent to above

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