Fiber Microscope HK-400D 400x

The DoubleTest series double-rate end inspection instrument can perform one focusing operation

 and simultaneously output two different magnification end face images. The large image is used

 for detecting the details of the fiber core, while the small image mainly focuses on checking the 

defects from the ceramic part to the edge. This reduces the number of inspections, minimizes 

wear and tear, and even indirectly helps in screening and judging the grinding standards of the 

jumper tail fibers. The simultaneous detection on the same screen enhances the inspection 

efficiency. With one workstation, one equipment, or a secondary screen for simultaneous detection, 

one focusing operation can achieve fiber end face inspection at double rates, saving inspection

 stations, improving inspection efficiency, and reducing production costs. It is currently the best 

high-standard and high-efficiency end face inspection equipment. 

The Eytianlong DoubleTest series dual-rate end inspection instrument supports multiple rate 

options, including 400X/70X, 200X/70X, 200X/50X, 400X/200X, 400X/80X, 200X/80X. Multi-screen 

inspection can increase efficiency by 10X, and this is no longer a problem. 

The  DoubleTest series of the Yitianlong product line features dual-rate end testers that support 

multi-device testing, including modules, pull-ring modules, TOSA/ROSA, MPO, FA, and other 

multiple terminal tests. 

Main Characteristics 

One focusing, full-end-face detection, multiple magnification options: 400X/70X, 200X/70X, 

400X/200X, 400X/80X, 200X/80X 

-  The high magnification mainly examines the details of the core, while the low magnification 

mainly checks for defects from the ceramic to the edge. 

-  Low magnification of 50X and 70X support SC and LC full-end face modules, components, 

jumpers, optical fibers, etc. for inspection, which improves inspection efficiency and reduces 

wear and tear. 

Dual optical paths: Bright light is used to observe the details of the fiber core, while low light is 

employed to examine the ceramic end face. 

The two lenses respectively ensure the corresponding clarity. 

Additional features are optional, including auto-focus, barcode storage, foot pedal for changing 

magnification, and other functions. 

Hidden touch switch for switching, reliable, stable and fast. 

Specialized stand for the secondary screen, supporting installation on both sides and up and 

down, suitable for different space requirements. 

50X / 70X high-magnification inspection of the SC LC PC APC end face and ceramic edge surface 

clearly reveals everything. 

For the ends of the SC, LC optical device jumper optical fibers, components, and modules, since 

their diameters do not exceed 1mm， any defects such as cracks， fissures， or large amounts of 

dirt that occur around or at the edges will， if not detected in time， have a high possibility of 

spreading to the central position of the optical fiber core， resulting in the unqualified quality of 

the optical device. Therefore， full-range and wide-field optical fiber end face edge inspection has 

become a basic requirement for manufacturers under the high standards. 

The  DoubleTest series dual-rate end inspection instrument is designed for the detection of ceramic 

edges of SC, LC optical device jumper tails, components, and modules. Unlike traditional end

 inspection instruments, it eliminates the need for rotation and adjustment. The detection process 

no longer involves up and down movement for viewing. With 50X and 70X small magnifications, 

the ceramic edge end faces of SC and LC can be inspected completely in one go. This not only 

meets the requirements for high-quality inspection but also enhances the inspection efficiency.

Dual-path design, high-magnification bright light for observing the details of the fiber core, 

and low-magnification dim light for observing the ceramic end face. 

The DoubleTest series double-rate end inspection instrument features dual lenses, dual optical 

paths and brightness design. Under high brightness, it can clearly view the details of scratches 

on the fiber core at high magnification. At low brightness, it can detect defects from the outer

 area of the ceramic C zone to the edge at low magnification. Both high and low brightness 

can be adjusted. The dual brightness enables full-end-face inspection, allowing the defects to 

be exposed and clearly visible, regardless of bright or dark conditions.

The resolution can be adjusted to meet different quality inspection requirements. 

Regarding the scratches on the surface, if they are just shallow scratches, fine scratches, weak 

scratches, or the smallest scratches, is it necessary to clearly detect them all? For the factory,

 following the standard inspection and achieving batch qualification is the ultimate goal. Going beyond the clear standard might even lead to unnecessary complications. If high definition and ultra-high definition can both meet the requirements, the resolution can be adjusted at any time to meet the needs of different levels of quality inspection. 

All series of end inspection instruments  have the function of adjustable resolution. Even with 

minor scratches, they no longer pose a problem. The equipment can be adjusted at any time 

to meet the needs of different manufacturers.

Various additional functions 

Compatible with the automatic focusing function, saving manpower 

The  DoubleTest series double-rate end inspection instrument can be equipped with automatic 

focusing and automatic brightness adjustment functions, eliminating the fatigue of manual 

focusing. The daily operation of 10,000 times is effortless, avoiding possible misjudgments caused 

by rapid manual focusing. Repeatedly inserting and removing components, the inspection images 

are 99% consistent, and no clear focused end surface is missed. 

More terminal connections are available, facilitating data transmission and document management. 

The  DoubleTest series double-rate end inspection instrument from Yitianlong can be connected 

to a computer, and the end face data can be scanned and stored. It is also compatible with the 

HOMK SpeedyTest series portable end inspection instrument, and can be paired with an

 integrated display for detection operations.