ASTM E1646對(duì)比靈敏度像質(zhì)計(jì)通常與EN462-5雙絲像質(zhì)計(jì)配套使用，ASTM E1646對(duì)比靈敏度像質(zhì)計(jì)主要用于檢測(cè)圖像系統(tǒng)的極限對(duì)比靈敏度，其結(jié)構(gòu)如下圖
ASTM E1646對(duì)比靈敏度像質(zhì)計(jì)是一種人工的試塊，在試塊上刻有四個(gè)正方形方槽，刻槽深度分別是試塊厚度的1，2，3和4％，如下圖示，對(duì)于同一種材料，又有四種不同的規(guī)格，以滿足在不同厚度上的靈敏度的測(cè)量。詳細(xì)的尺寸規(guī)格見(jiàn)下表，并請(qǐng)參照上面的結(jié)構(gòu)圖
ASTM E1646對(duì)比靈敏度像質(zhì)計(jì)通常由以下材料制成
Magnesium | 代號(hào) 03 |
Aluminum | 代號(hào)02 |
Titanium | 代號(hào)01 |
Steel or Stainless Steel (300 Series) | 代號(hào)1 |
Aluminum Bronze Alloy #623 Or #630 | 代號(hào)2 |
NI-CR-FE (Inconel 600) | 代號(hào)3 |
70 to 30 Nickel Copper (Monel) or 70 to 30 Copper Nickel (CU-NI) | 代號(hào)4 |
Tin Bronze Alloy D of B 139 | 代號(hào)5 |
尺寸 | 長(zhǎng) x 寬 | 覆蓋檢測(cè)的厚度范圍 |
1 | 3/4" x 3" | 0.25" - 1.50" |
2 | 1 1/2" x 6" | 1.75" - 2.75" |
3 | 2 1/4" x 9" | 3.5" - 6.0" |
可以提供如下規(guī)格對(duì)比靈敏度像質(zhì)計(jì)
型號(hào) | 描述 | 訂貨號(hào) |
CSG-AL-1 | Aluminum, Size 1 | RT-RC-CSG-AL-1 |
CSG-AL-2 | Aluminum, Size 2 | RT-RC-CSG-AL-2 |
CSG-AL-3 | Aluminum, Size 3 | RT-RC-CSG-AL-3 |
CSG-CS-1 | Steel, Size 1 | RT-RC-CSG-CS-1 |
CSG-CS-2 | Steel, Size 2 | RT-RC-CSG-CS-2 |
CSG-CS-3 | Steel, Size 3 | RT-RC-CSG-CS-3 |
CSG-SS-1 | Stainless Steel, Size 1 | RT-RC-CSG-SS-1 |
CSG-SS-2 | Stainless Steel, Size 2 | RT-RC-CSG-SS-2 |
CSG-SS-3 | Stainless Steel, Size 3 | RT-RC-CSG-SS-3 |
CSG-MG-1 | Magnesium, Size 1 | RT-RC-CSG-MG-1 |
CSG-MG-2 | Magnesium, Size 2 | RT-RC-CSG-MG-2 |
CSG-MG-3 | Magnesium, Size 3 | RT-RC-CSG-MG-3 |
CSG-TI-1 | Titanium, Size 1 | RT-RC-CSG-TI-1 |
CSG-TI-2 | Titanium, Size 2 | RT-RC-CSG-TI-2 |
CSG-TI-3 | Titanium, Size 3 | RT-RC-CSG-TI-3 |
CSG-IN-1 | Inconel, Size 1 | RT-RC-CSG-IN-1 |
CSG-IN-2 | Inconel, Size 2 | RT-RC-CSG-IN-2 |
CSG-IN-3 | Inconel, Size 3 | RT-RC-CSG-IN-3 |
CSG-CU-1 | Copper, Size 1 | RT-RC-CSG-CU-1 |
CSG-CU-2 | Copper, Size 2 | RT-RC-CSG-CU-2 |
CSG-CU-3 | Copper, Size 3 | RT-RC-CSG-CU-3 |
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