测试卡说明
测试卡可以做成箔片或者反射测试图,可以选择正的(见图)或者负的。箔片的厚度为0.10或0.018mm。图像外观尺寸297x210cm(DIN A4)。
测试图由以下部分组成:
•5个No.2 ISO测试模式矩阵
•19个各自长度为28厘米的水平和垂直测试毫米规模
•每两个水平和垂直程度标记为120mm和5"

ISO的No.2测试模式由26组2x5的线对以彼此成为直角的方式分布在图像上。线对具有1.0至18线对/毫米的标称值。标称值通过因子1.225(6 2)从一组向另一组增加,即线对/毫米值每6组后加倍。
测试图满足了在ISO/ DIN19051给出的三个条件(见上方的框)*。
测试图案被设计用于扫描装置的图像质量评估。
长度120mm标记5"用于检测所选图像的缩小率。水平和垂直方向的毫米刻度用于检测扫描过程的均匀性。
测试图的密度是:
透明测试箔:透明图像区域0.04;黑色图像区域>3.0
反射测试图:图片中白色的0.07,黑1.6
The test chart can be supplied as a foil or a reflectance chart, alternatively positive (see fig.) or negative. The foil is available on 0.10 or 0.18 mm thickness. Image end external size is 297 x 210 mm (DIN A4).
The test chart is composed of
•5 test arrays with ISO test pattern no. 2
•horizontal an vertical mm measuring scale of 19 resp. 28 cm length
•each two horizontal and vertical length marking of 120 mm and 5''
The ISO test pattern no. 2 consists of 26 groups of 2 x 5 line pairs which are arranged at right angle to each other. The line pairs have a nominal value of 1.0 to 18 lp/mm. The nominal value increases by factor 1.225 ( 6 2 ) from one group to the other, i.e. the lp/mm value doubles after each 6 groups.
The test chart fulfills the three conditions that are given in ISO/DIN 19051 (see box above)*.
The test pattern is designed for assessment of the image quality of scanning devices.
Note: The line pairs with the width S can be equated to the local frequencies with the wavelength λ = S according to the transmisson gamma. The measured limit of the local frequencies allows the determination of a characteristic value for the resolution power (in lp/mm) for a micro image.
The length marking of 120 mm resp. 5'' are used to check reduction ratio selected for the image. The horizontal and vertical mm scale serves for checking the uniformity of the scanning process.
Densities of the test chart are:
transparent test foil: transparent image areas 0.04; black image areas > 3.0
reflectance test chart: picture white 0.07, black 1.6
购买须知
1、厂家货源正品
厂家直销,公司生产周期短,出厂严格检测,货品品质保障,可通过国家计量院计量。
2、关于尺码
机身和包装尺寸为手动测量,由于测量工具和测量方法不同的因素,会存在1cm误差,但是不用影响运输和使用。
3、关于颜色
小店产品都是实拍图片,但是由于不同显示器分辨不同以及色温和对比度差异有所不同。
4、关于客服
可以通过阿里旺旺随时联系我们,如果旺旺恢复不及时也可以拨打我们的热线电话13510876292/13510847362/18902317916
5、关于售后
我们将提供完整的售后服务,包括15天退货,正品保证,交期保障等等。
6、关于发货
小店默认省内法速尔,省外默认中通,如果该发其他快递我们会酌情收取差价。