Dark field luminance Meter

A dark field brightness meter measures the brightness of low-reflectance surfaces by blocking direct light and only receiving scattered light from the object's surface. It is used to detect the surface gloss characteristics of matte materials, rough surfaces, and dark-colored samples, and is applied in quality inspection for coatings, plastics, and paper.
Selection
When selecting a dark-field brightness meter, it is essential to consider the match between the measurement angle and the surface characteristics of the sample. Confirm that the measurement range covers the brightness levels of the samples to be tested. Check that the instrument’s repeatability error is less than 5%. Ensure the probe size is suitable for the detection area, and verify that the temperature stability meets the requirements of the on-site environment.

Terms

Instruments

It has the function of switching between light and dark field of view, supports 40X-1600X magnification range, and uses oblique illumination to make the outline of the sample clearly visible. It is suitable for morphological observation of unstained biological samples.

$ 761.00

Optical inspection system and Modular design can be used to upgrade the functions of polarization and dark field observation; coarse fretting coaxial focusing system fretting grid value of 2 μ m, cylindrical roller guide drive to ensure smooth lifting, suitable for different Film thickness workpiece detection.

$ 6012.00

Infinity Optical inspection system, equipped with 5X-50X Bright & Dark Field objective lens, working distance 2.5-9 mm, mildew-proof design and mechanical mobile stage, support polarized observation and camera function.

$ 6496.00

Range up to 1 million cd/m ², 10mm and 20mm replaceable Probe, support instantaneous measurement, simultaneous display of real-time luminance values, MAX Maximum, MIN Minimum and Average, and stroboscopic measurement and Spectral Curve analysis.

$ 264.00

Full Chinese menu operation, high luminance LED backlight is easy to use in gray environment with rays of light, automatic sleep and automatic shutdown power saving design, lithium battery can work for 10 hours, support 360 ° measurement direction, store 600 sets of data.

$ 977.00

Optical inspection system and Modular design can be used to upgrade the function of polarization and dark field; equipped with a large moving range stage (204mm × 204mm) and a focusing mechanism with a fretting grid value of 0.7 μm, compact, stable and comfortable operation.

$ 4398.00

Imported high-luminance Illuminant and narrowband filter system, Optical inspection stability, measurement range 0~ 400NTU, Accuracy ≤ +/- 2% F. S, support data storage and USB interface upload.

$ 774.00

Adopt hinged tri-head, total magnification 40X-1000X, equipped with color difference objective lens and adjustable pupil distance 55-75mm, support phase contrast, dark field and other observation methods, double-decked mechanical stage moving range 75X45mm.

$ 687.00

Equipped with large field of view eyepiece and long working distance flat field color difference objective lens, working distance up to 50mm, with phase contrast device to observe unstained transparent living body, fretting grid value of 2μm to ensure accurate focusing.

$ 2784.00

Imported high-luminance Illuminant and narrow-band filter system, Optical inspection stability ≤ 0.002A/20min, support users to calibrate Linear dispersion, the main cabinet is made of anti-corrosion ABS material.

$ 499.00

Measurement range is 0~ 1999mcd · lx-1 · m-2, which supports field and laboratory use and meets a number of international and domestic standards.

$ 1763.00

Using long working distance flat field color difference elimination objective lens and insert plate phase contrast condenser lens, working distance 30mm, support double-decked mechanical moving stage, adapt to a variety of culture dishes, easy to dynamic microscopic observation and comfortable operation.

$ 2462.00

Equipped with a long working distance flat-field color difference elimination objective lens and four sets of fluorescence filters, it supports phase contrast observation and fluorescence switching, and the fretting grid value is up to 2 μm, which is suitable for clear imagery of living cells and liquid samples.

$ 10207.00

Optical inspection system with infinity, equipped with long working distance condenser and working distance 55mm, swirl/spin swing-out condenser system can observe high culture dishes without contamination, compact and high rigidity body to meet vibration protection requirements.

$ 3268.00

The high-power LED Illuminant has a lifespan of over 100,000 hours, four test modes can automatically re-test 6 times to calculate the mean, the measurement range is +/- 45 °, and the minimum reading is 0.001 °. It supports the detection of dark samples with a transmittance of 1%.

$ 2397.00