反射标准参考

为了获得被测样品的吸光度，我们必须获得它的反射率，即相对于标准参考的反射率。海洋光学公司开发出下面几种反射标准参考，以供测量不同样品时选择：
1.STAN-SSL 低反射率镜面反射标准——适宜测量低反射率的样品，譬如：测量像薄膜层，抗反射层，阻挡滤光片等。 STAN-SSL的涂敷层在200-2500nm范围内提供~4.0%反射率。
2.STAN-SSH 高反射率镜面反射标准——适宜测量高反射率的样品，譬如：测量像感光底层，光涂层，机加金属和半导体材料等。STAN-SSL在200-800nm波长范围内提供~85-90%反射率，在800-2500nm波长范围内提供~85-98%反射率。
3.WS-1 漫反射标准参考白板是由PTFE制造的。PTFE可以被制作得非常精确，并可被加工成无定形结构，对于波长400-1500nm的反射率大于98%，对于250-2000nm的反射率大于95%。WS-1具有非常好的长期稳定性，即使在紫外区也同样显示其良好的稳定性。同时不易被水沾湿，化学性质也不活跃。
4.WS-1-SL是Labsphere公司生产的漫反射标准白板，采用专利的Spectralon反射材料制作。Spectralon不怕水而且热稳定性可以到350度。稳定的材料保证客户可以获得长期准确可重复的数据。不像其他PTFE材料的标准，WS-1-SL如果污染或者有划痕，也可以再次磨平使用。 
5.WS-3-GEM由漫反射材料PTFE制成，其不锈钢容器内部被做成凹面形，使得光线照射时，WS-3-GEM呈现为一个积分球。WS-3-GEM可用于钻石或其他宝石的色度测量。WS-3-GEM对400-1500nm的反射率大于98%，对250-2000nm的反射率大于95%。与WS-1类似，WS-3-GEM的反射材料不易被水沾湿，化学性质不活跃，并且具有非常好的长期稳定性。
进一步详细信息，参见以下英文介绍：
STAN-SSL Low-reflectivity Specular Reflectance Standard

The STAN-SSL Low-reflectivity Specular Reflectance Standard is a black glass standard that can be used as a  reference when measuring surfaces with low specular reflectance values such as thin film coatings, anti-reflective coatings, blocking filters and substrates. The coated surface of the STAN-SSL provides an ~4.0% reflectance across the  200-2500 nm wavelength range.

The STAN-SSL substrate measures 1.25" in diameter and is housed in a sturdy 1.5" x 0.75" blue anodized aluminum enclosure and protected by a screw-on top.
STAN-SSL Specular Reflectance 

 
Specifications

Substrate Dimensions:	1.25" outer diameter x 0.25" height
Housing Dimensions:	1.5" outer diameter x 0.75" height
Reflectance material:	Black glass
Reflectivity:	~5.4% (200-950 nm) ~4.0% (950-2500 nm)

STAN-SSH High-reflectivity Specular Reflectance Standard

The STAN-SSH High-reflectivity Specular Reflectance Standard is a mirrored, fused-silica standard that can be used as a  reference when measuring surfaces with high specular reflectance values such as optical substrates, optical coatings, machined metals and semiconductor materials. The STAN-SSH provides an ~85-90% reflectance across the 250-800 nm wavelength range and an ~85-98% reflectance across the 800-2500 nm range.

The NIST-traceable STAN-SSH-NIST is calibrated to a NIST master (NIST part number NIST38060S, s/n 99G16) with approximately 1.0% accuracy from 250-2500 nm). With the shipment of the NIST-traceable version, the customer will receive a certificate of calibration, a data sheet with the reflectance values as a function of wavelength and a diskette which contains calibration data that can be transferred to Ocean Optics Spectrometer Operating Software.
A periodic recalibration of the STAN-SSH-NIST is recommended. Ocean Optics offers a recalibration service (STAN-SSH-RECAL) for Call for Price. Should the calibrated surface become corrupted, a recoat and calibration service is offered for only $390.
The STAN-SSH substrate measures 1.25" in diameter and is housed in a sturdy 1.5" x 0.75" blue anodized aluminum enclosure and protected by a screw-on top.
STAN-SSH Specular Reflectance 

Specifications

Substrate Dimensions:	1.25" outer diameter x 0.25" height
Housing Dimensions:	1.5" outer diameter x 0.75" height
Reflectance material:	Mirrored, fused-silica with protective overcoat
Reflectivity:	~85-90% (250-800 nm) ~85-98% (800-2500 nm)

 
Diffuse Reflectance Standards

WS-1 Diffuse Reflectance Standard
	The WS-1 Diffuse Reflectance Standard is made of PTFE, a diffuse white plastic that provides a Lambertian reference surface for reflectance experiments. The WS-1 comes in an anodized aluminum housing, and is hydrophobic, chemically inert and very stable, even in deep-ultraviolet applications. It is >98% reflective from 250-1500 nm and >95% reflective from 250-2200 nm. The reflective area of the WS-1 has a 32 mm OD. The diffusing material is encased in a small receptacle with screw-on top. The material is almost uniformly reflective (>95%) by wavelength across the entire range of 250-2000 nm.
WS-1-SL White Reflectance Standard with Spectralon
	The WS-1-SL is a diffuse reflectance standard from Labsphere and is made from their patented diffuse reflectance material, Spectralon. Spectralon is hydrophobic and is thermally stable to 350 °C. The durable material provides highly accurate, reproducible data. Unlike all the other PTFE-based standards on this page, the WS-1-SL often can be smoothed, flattened and cleaned if nicked or soiled.
WS-1-SS White Standard with Stainless-steel Housing
	The WS-1-SS comes in a stainless steel housing and has the same properties as the WS-1. In addition, the surface of the WS-1-SS is slightly recessed to allow the RPH-1 Reflection Probe Holder to sit on the standard without coming in direct contact with the standard’s surface.
WS-3-GEM White Standard
	Conceived for use in colorimetric applications involving diamonds and other gems, the WS-3-GEM White Reference Tile consists of a diffuse PTFE-based material, shaped to form a holder within its stainless steel receptacle. Because of its concave shape, the WS-3-GEM becomes an integrating sphere when illuminated. The WS-3-GEM has >98% reflectivity from 400-1500 nm and >95% reflectivity from 250-2000 nm. Like the WS-1, the WS-3-GEM's reflectance material is hydrophobic, chemically inert and very stable, even in deep-UV applications.

 
Specifications

Specification	WS-1	WS-1-SL	WS-1-SS	WS-3-GEM
Dimensions housing:	38 mm diameter	38 mm diameter	38 mm diameter	38 mm diameter
Dimensions tile:	32 mm OD, 10 mm thick	32 mm OD, 10 mm thick	32 mm OD, 10 mm thick	31 mm OD, 10 mm thick
Weight:	30 g	30 g	30 g	70 g
Spectral range:	250-2000 nm	250-2500 nm	250-2000 nm	250-2000 nm
Housing:	Aluminum	Delrin holder, protective cover	Stainless steel	Stainless steel
Reflectivity:	>98% (250-1500 nm) >95% (250-2200 nm)	99% (400-1500 nm) >96% (250-2000 nm)	>98% (250-1500 nm) >95% (250-2200 nm)	>98% (250-1500 nm) >95% (250-2200 nm)

反射标准参考信息由北京思百可技术有限公司为您提供，如您想了解更多关于反射标准参考报价、型号、参数等信息，欢迎来电或留言咨询。

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