Sign In | Join Free | My burrillandco.com
Home > Image Test Chart >

MULTI BURST TEST CHART for resolutiong testing of Camera

Shenzhen ThreeNH Technology Co.,Ltd
Shenzhen ThreeNH Technology Co.,Ltd
City: Shenzhen
Province/State: Guangdong
Country/Region: China
Tel: 86-755-27198826-618
Contact Person:
Ms Angelya Liu
    Buy cheap MULTI BURST TEST CHART for resolutiong testing of Camera from wholesalers
     
    Buy cheap MULTI BURST TEST CHART for resolutiong testing of Camera from wholesalers
    • Buy cheap MULTI BURST TEST CHART for resolutiong testing of Camera from wholesalers
    • Buy cheap MULTI BURST TEST CHART for resolutiong testing of Camera from wholesalers
    • Buy cheap MULTI BURST TEST CHART for resolutiong testing of Camera from wholesalers

    MULTI BURST TEST CHART for resolutiong testing of Camera

    Ask Lasest Price
    Brand Name : Sine Imgae/Esser
    Model Number : YE107/TE107
    Certification : ISO9001
    Payment Terms : T/T
    Supply Ability : 1000 pcs per month
    Delivery Time : 4 work days
    • Product Details
    • Company Profile

    MULTI BURST TEST CHART for resolutiong testing of Camera

    MULTI BURST TEST CHAR

    REFLECTANCE

    A line raster is arranged in the center of the test chart which produces frequencies of 0.5 to 10

    MHz in the output of the TV camera. 0.5 MHz line pairs are also arranged at the center of the

    line raster immediately adjacent to the 5 MHz line pairs. Bar rasters are located in the corners

    of the test charts and produce frequencies of 0.5 and 5 MHz.


    The frequencies response of modulation depth and the uniformity of modulation depth can be

    established with the aid of the line rasters. The signal amplitude of the 0.5 MHz rasters is the

    reference value.


    Measuring equipment: Video oscilloscope or preferably video oscilloscope with memory.

    Measurements conditions: The camera settings must be as follows


    Shading correction: ON

    Aperture correction: OFF

    Gamma correction: OFF

    Contour correction: OFF

    Color correction: OFF


    Iris: F/5.6 for 2/3 “CCD, F/4 1/2” CCD


    The test chart is evenly illuminated so that for the low frequency burst at 0.5 MHz the amplitude

    of the video signal at the output of the correctly positioned and focused camera is 0% (0V) for

    the black bars and 100% (700mV/ 75 Ohms) for the white bars.


    Care must be taken to avoid clipping of the signal to be measured at the black and white level.


    Measurement procedure

    Measurements can be made on the various camera output signals, but preferably on the Y

    luminance signal (or coded Y with perfect B and W balance). This measurement is made

    at the center of the image and at the corners so that account is taken of the lateral chromatic

    aberration of the lens. In addition to determining camera response to the particular value of

    5 MHz, measurement of the response at the other frequencies serves to plot a curve giving

    contrast loss according to the spatial frequency of the test chart. Frequency bursts of 0.5

    MHz and 1 to 7 MHz are recommended for this measurement. The measurements give the

    contrast loss of the camera response at the value of 1 to 7 MHz. The obtained response is

    a contrast transfer function (CTF).


    Mathematical relations can be used to calculate the MTF according to the CTF values:


    MTF(N)= π/4[CTF(N) + 1/3 CTF(3N) - 1/5 CTF(5N) + 1/7 CTF(7N) - 1/9 CTF(9N) + 1/11 CTF(11N) ...]


    where N is the spatial frequency of the test chart analysed; N in TVL/H


    In the - probable - case of a beat affecting camera response for a given spatial frequency,

    and under certain conditions only, the measured signal reassembles an

    amplitude-modulated carrier signal, as shown in the following figure



    The percentage of modulation is then defined by the relation:

    % mod = M / X

    The interference ripple at this frequency is given by:

    p % = m / M

    x = Amplitude of the 0.5 MHz signal

    The results of the measurement can be shown in a table representing the various areas of

    the image measured.


    CTF values at 5 MHz

    xxx % xxx %

    xxx %

    xxx % xxx %

    Quality MULTI BURST TEST CHART for resolutiong testing of Camera for sale
    Inquiry Cart 0
    Send your message to this supplier
     
    From:
    Enter your email please.
    To: Shenzhen ThreeNH Technology Co.,Ltd
    Subject:
    Message:
    Characters Remaining: (0/3000)
     

    Home| Products| Suppliers| Quality Suppliers| Site Map |About Us |Contact Us |Help |关于我们 |联系我们

    Copyright © 2009 - 2018 burrillandco.com. All rights reserved.