概述
ASD FieldSpec? 4 Standard-Res 便攜式光譜輻射儀是各種遙感應用的理想選擇，包括多光譜傳感器地面實況調查和校準、農業分析以及雪冰研究。 除了作為的光譜輻射儀外，ASD FieldSpec 4 Standard-Res 還同樣適合用作堅固的便攜式光譜儀，用于進行準確的接觸反射率或非太陽距離測量。關鍵應用
ASD FieldSpec 4 Hi-Res NG 光譜儀適合在許多行業應用中使用，包括：
植物生理學
ASD 系統用于確定植物生理狀態，包括病情狀況、與氮素吸收和水分平衡相關的營養狀況。
偽裝表征和檢測
偽裝或隱藏物體的檢測需要能提供物體和背景材料之間對比的測量。
傳感器校準
成像傳感器的精確輻射度校準對許多遙感應用至關重要。
監督分類
可以使用圖像導出的或野外測量的光譜特征來執行監督分類。
光譜輻射和輻射度校準
光譜輻射是對每種波長下的光輻射的測量，適用于多種設置，包括測量燈、LED 顯示屏或其他光源的光譜能量輸出，以確定到達森林地被物或其他場所的陽光通量。
光譜遙感
采集可見光、近紅外和短波紅外圖像，以對表面材料、生物和化學過程進行檢測、鑒定和定量，適用于多種環境和軍事應用中的研究和分析。
地面實況調查
實驗室質量的原位現場測量具有等值照度和查看幾何，以便準確關聯衛星和飛機傳感器數據。
遙感和地質
幾十年來，ASD 的光譜輻射儀一直用于遠程地質解讀。
野外光譜學
野外光譜學 — 研究野外環境中的物體光譜特征與其生物物理屬性之間的相互關系。
景觀生態學和生態學研究
能夠在野外準確執行植被和土壤的反射率及輻射度測量對于了解植物群落內的光能利用和分區至關重要。
大氣遙感研究
對直射、漫射和總光譜太陽輻照度以及天空和云輻射度的觀察對于許多氣候和生態系統能量平衡研究中的大氣研究至關重要。
航空遙感測量
采集過大或無法進行地面測量的區域的光譜。
生物質分析
從大豆和其他作物的油含量表征到生物燃料處理中關鍵參數水平的定量和終產品的質量分析，近紅外 (NIR) 光譜是理想的測量工具。
技術指標
| 光譜范圍 | 350-2500 nm |
| 光譜分辨率 | 3 nm @ 700 nm 10 nm @ 1400/2100 nm |
| 光譜采樣（帶寬） | 1.4 nm @ 350-1000 nm 1.1 nm @ 1001-2500 nm |
| 掃描時間 | 100 毫秒 |
| 雜散光規格 | VNIR 0.02%、SWIR 1 和 2 0.01% |
| 波長再現性 | 0.1 nm |
| 波長精度 | 0.5 nm |
| 大輻射度 | VNIR 2X Solar、SWIR 10X Solar |
| 通道 | 2151 |
| 檢測器 | VNIR 檢測器 (350-1000 nm)：512 元素硅陣列 SWIR 1 檢測器 (1001-1800 nm)：漸變折射率 InGaAs 光電二極管，雙級 TE 冷卻 SWIR 2 檢測器 (1801-2500 nm)：漸變折射率 InGaAs 光電二極管，雙級 TE 冷卻 |
| 輸入 | 1.5 m 光纖（25° 視場）。 提供可選的視場更窄的光纖。 |
| 噪聲等效輻射 (NEdL) | VNIR 1.0 X10-9 W/cm2/nm/sr @ 700 nm SWIR 1 1.2 X10-9 W/cm2/nm/sr @ 1400 nm SWIR 2 1.9 X10-9 W/cm2/nm/sr @ 2100 nm |
| 重量 | 5.44 kg (12 lbs) |
| 校準 | 波長、反射率、輻射度*、輻照度*。 所有校準均為 NIST 可溯源校準。 （*輻射度校準為可選） |
| 計算機 | Windows? 10 64 位筆記本電腦（儀器控制器） |
| 保修 | 一年完整保修，包括專家級的客戶支持 |
附件
ASD FieldSpec® 4 Standard-Res 光譜輻射儀
探頭和照明
Contact Probe
The ASD Contact Probe is designed for contact measurements of solid raw materials such as minerals, grains, other granular materials. Its innovative optical design minimizes measurement errors associated with stray light and allows for measurement of samples through clear and transparent plastic bags.
In addition to the standard contact probe, ASD also offer the Hi-Brite contact probe and the Plant Probe.
All contact probes are available with a ruggedized cable feed and cable, designed for applications that involve extra cold or harsh temperatures. (see image below specifications)
Specifications:
| Length | 10" ( 25.4 cm) |
| Weight | 1.5 lbs (.7 kg) |
| Power requirements | 12-18 VDC, 6.5 W |
| Lightsource type/Life (approx.) | Halogen bulb/1500 hours |
| Halogen bulb color temperature | 2900 K |
| Spot size | 10 mm |
Hi-Brite Contact Probe
The same design, features, and benefits of ASD's standard contact probe, but with a higher intensity illumination setting on the sample window. This higher intensity illumination is ideal for inorganic applications, and is recommended for mineral and ore characterization in mining exploration and research applications using the TerraSpec, FieldSpec 4 Hi-Res and LabSpec Hi-Res spectrometers.
Muglight
The ASD Muglight is designed for analysis of raw materials requiring reflectance and absorbance measurements. It can measure samples through glass vials, or using the ASD sampling tray adapter. It's unique and innovative design minimizes measurement errors associated with stray light and specular reflected components.
For users requiring higher intensity illumination, ASD also offers the Hi-Brite Muglight.
Muglight specifications:
| Size | 5.5” x 3.7” (14cm x 9.4cm) |
| Weight | 2.91 lbs (1.3 kg) |
| Power requirements | Input power 5.5 W, bulb 4 W |
| Light source (type/life) approx. | Tungsten Quartz Halogen b/1500rs |
| Bulb color temp | 2900 K |
| Spot size | 12 mm |
Turntable
When your application requires analysis of irregularly shaped or non-homogeneous samples, the ASD Turntable is ideal for obtaining a highly accurate average. Especially useful for instrument owners in the grain, agriculture, pulp and paper, food, plastics and mining industries.
The Turntable offers:
- 53.2 mm sampling spot size
- Rotates at 22 RPM
- Fits up to a 150mm sample dish
- Compact (8"x11"x11" or 20.32 cm x 27.94 cm x 27.94 cm) footprint.
The Turntable comes standard with a 4000 hour halogen light source and one standard 150 mm x 15 mm Petri dish.
Plant Probe
The same great design and functionality as ASD's standard contact probe
with a lower intensity bulb position for non-destructive data collection from live vegetation and other heat sensitive targets.
Leaf Clip
ASD's Leaf Clip assembly is designed specifically for use with the Plant Probe to simplify the process of collecting spectra on live vegetation. The unique design includes a gentle trigger lock/release gripping system for holding the target sample in place without removing the leaf from its habitat, or inflicting damage.
Integrating Sphere
Integrating spheres collect reflected light from samples over a full hemisphere. The sphere, by nature of its internal diffuse (lambertian) reflection and integration of the energy, is insensitive to directional reflectance features coming from the sample, and therefore, gives a very repeatable “averaged” response to the reflectance of the sample placed in the beam at the sphere port. Sample placement and incidence beam/collection alignment are less critical to the measurement results because the integrating sphere looks at representative averaged energy from all angles at the same time.
Hi-Brite Muglight
The same design, features, and benefits of ASD's standard Muglight, but with a higher intensity illumination setting on the sample window. This higher intensity illumination is ideal for inorganic applications, and is recommended for use with the TerraSpec, FieldSpec 4 Hi-Res, and LabSpec 4 Hi-Res spectrometer models.
The Hi-Brite Muglight is designed for analysis of raw materials requiring reflectance and absorbance measurements. It can measure samples through glass vials, or using the ASD sampling tray adapter. It's unique and innovative design minimizes measurement errors associated with stray light and specular reflected components.
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Fiber Optic Illuminator
The Fiber Optic Illuminator is a portable, external light source designed for use with ASD instruments and sampling accessories that do not have a built-in light source.
Technical Specifications
| Length | 11.43 cm (4.5 inches) |
| Width | 8.255 cm (3.25 inches) |
| Weight | 292 grams (10.3 ounces) |
通用附件
Pistol Grips
ASD offers multiple pistol grip options for superior ease-of-use and adaptability to a variety of environmental and situational elements, when using your FieldSpec? and FieldSpec HandHeld instruments. All pistol grip designs include the quick-connect/disconnect fiber optic cable snap-in feature, pistol grip clip assembly for safely and securely affixing the pistol grip to your waist-belt on the back pack, and many offer a built-in bulls-eye level for added precision.
FieldSpec Dual
Stop waiting for “ideal” weather to get your fieldwork done
The FieldSpec Dual collection software system leverages the value and utility of the world’s most trusted line of portable field spectrometers. The software intercalibrates and wirelessly synchronizes two ASD FieldSpec spectroradiometers to collect near simultaneous white reference and sample target radiance spectra. The system virtually eliminates errors associated with time varying atmospheric conditions, one of the biggest challenges to collecting accurate field spectra.
