JVC VR-609U IR cut filter on/off function, Easy day/night function, Focus adjustment function

Technical Information http://pro.jvc.com

4 IR cut filter on/off function IR ON/OFF

IR cut filter makes it possible to capture both color, black and white images with just one camera. This is done by turning the filter to "ON" when shooting in sunlight during the day for color images and turning it to "OFF" at night for black and white images. Therefore continuous twenty- four-hour surveillance is possible thanks to this function.

* Noise will briefly occur on the screen when switching to the IR cut filter.

Spectral sensitivity characteristics of the CCD

	1.0					New CCD
						New CCD + IR cut filter
Sensivity						Conventional CCD
	0.5
	0.0
	400	500	600	700	800	900	1,000
		Visible light range (color images)			IR range (B&W images)

Wavelength (nm)

Object cameras: TK-C925U [P.3], TK-C1530U [P.3], TK-C1460U [P.4], TK-C625U [P.8], VN-C625U [P.24] and VN-C655U(B) [P.25]

5 Easy day/night function Easy D/N

Camera uses color mode when the object is bright, and black and white mode when it is dark. (In this mode, AGC is always active regardless of the setting.)

Morning Day light High contrast						Evening		Night time
			Auto tracking white balance (ATW)
Easy day/night								AGC mode
	off	Auto iris
						AGC mode
		normal mode
				color
Easy day/night					color signal
							off
	on	Auto iris						B&W mode AGC
		normal mode				AGC mode		more than 3.5 dB
				color					B&W

Object cameras: TK-C920U(A) [P.2], TK-WD310U(B) [P.5], TK-C205U(A) [P.6], TK-C215V4U(A) [P.6], TK-C215V12U(A) [P.6], TK-C215VP4U [P.7], TK-C215VP12U [P.7], VN-C20U [P.23], VN-C205U [P.23] and VN-V215V4U [P.24]

Line-up Chart

Color Camera

Storage

Flat &

6 Focus adjustment function	Adjustment
	Focus

Panel Monitor

By turning the focus adjustment function to "ON" when adjusting the focus, the lens iris is forcibly opened and the zone of acceptable focus (depth of field) becomes shallow (i.e. the zone of acceptable focus narrows). This enables more accurate focusing than would be possible under ordinary conditions. Once the necessary adjustments have been made and the function has been turned to "OFF", the iris returns to its optimal state.

Object camera: TK-C205U(A) [P.5] and VN-C205U(A) [P.23]

When the focus adjustment function is turned "ON", the lens iris is focused fully open for about 30 seconds before returning to its original position. This results in a shallow depth of field (high-speed shutter) and makes it much easier to adjust focus.

Object cameras: TK-C925U [P.3], TK-C1530U [P.3], TK-C215V4U(A) [P.6], TK-C215V12U(A) [P.6], TK-C215VP4U [P.7] and TK-C215VP12U [P.7]

What is depth of field ?

When a video is taken with the lens focused on the main object, there is a zone in which objects both in front of and behind the main object appear to be in focus. This zone is referred to as the "depth of field". When the zone of acceptable focus is broad, the depth of field is said to be "deep", and when the zone is narrow, the depth of field is said to be "shallow". If the depth of field is deep, the video will appear to be in focus from front to back. If the depth of field is shallow, however, only the main object will actually

be in focus.	Depth of field	Shallow	Deep
	Lens	Tele angle	Wide angle
	Exposure	Open	Narrow
	Position of object	Close	Far

	Display
Products	IP Security
Information	System

7 Vandal resistant	Resistant
	Vandal

Iron pole

Weight 8 lbs. (3.6 kg)

Diameter 2 inches (5 cm)

Height 1.83 m

Results

	Weight 1.5 times more	Weight twice times
Weight: 3.6 kg	Weight: 5.4 kg	Weight: 7.2 kg
Height: 1.83 m	Height: 1.83 m	Height: 1.83 m
OK	OK	OK

After performing this standard test the dome cover did not sustain any cracking. The test was repeated with twice the initial test weight and again there was no evidence of cracking.

Information	Technical
Glossary

Object cameras: TK-C215VP4U [P.7] and TK-C215VP12U [P.7]

Index

JVC Video Surveillance Products 2006-2007 37