Transmitted illumination

It’s one of the lighting methods used in microscopes and digital microscopes. This method involves illuminating from behind the object, also known as backlighting.

There are different types such as edge-type (reflecting off the wall surface) and direct-type (directly illuminating in a vertical direction).


Edge lighting
Direct lighting
Edge lighting
  • It is slim and compact.
  • It minimally affects the working distance (W.D.).
Compared to direct lighting,
Illumination intensity decreases.
Direct lighting It can emit high-intensity light.
(Ideal for pinhole inspection, etc.)
Due to its substantial thickness, it often exerts influence on the W.D.


Transmitted illumination can be applied to the following observations:
– Emphasizing the edges of objects for dimensional measurements and defect checks.
– Pinhole checks on films and similar materials.
– Nozzle blockages.
– Confirming crystals in aqueous solutions.

Combining an XY table with transmitted illumination for dimensional measurements


<Instrumentation Used>
Transmitted illumination RD-95T, XY table TD100-25MX with digital micrometer


デジタルマイクロメータ付XYテーブル TD100


Using a transmitted illumination stand for detecting pinholes in films


<Instrumentation Used>
Transmitted illumination stand GR-STD8



透過照明付スタンド GR-STD8


・Nozzle clogging


Only incident illumination  

Combining incident and transmitted illumination

ノズルのつまり やじるし ノズルのつまり


We offer stand-type and surface illumination-type transmitted illumination systems at our company.

Stand-type (direct type)  
透過照明付きスタンド(ランプ式) Transmitted illumination stand (lamp type) GR-STD8
透過照明(面発光) 透過照明(面発光)





For simpler applications, a commercially available photo negative observation backlight can sometimes be substituted. These typically cost around 10,000 yen, but they have low light intensity and limited adjustability.





Product Inquiry phone028-3911-2006


General Specification




Feature of the pre-installed software for Simplified Measurement


  • Observe live video
  • Simultaneous display of live image and save screen
  • Save the still image (JPEG, BMP)
  • Pause the observed image (Freeze Function)
  • Measure the distance between two points
  • Supported OS: WindowsXP, Vista, 7, 8 and 10 (Compatible with 32bit and 64bit)
  • * Saving and reading calibrated data while measure

Glass scale for the calibrations is option.

A powerful measuring software MeasurePRO


A measuring software developed by our company.
Able to display multiple crosslines, grids, saved thumbnails and comments. Can export the data to Excel.

  • Measuring types

    [Distance between 2 points]
    [3 Points Angle]
    [4 Points Angle]
    [Distance between 2 circles]
    [Perpendicular line]

  • Features

    ・Export to excel
    ・Show multiple crosslines
    ・X, Y axis scales
    ・Show grid lines
    ・Display both saved image and live image on separate screens
    ・Insert comments



Measuring software with focus stacking function

Standard accessories are two glass scales for calibration (GS - 0.2, GS - 0.5).

Measure easily on the screen.

  • Measuring types

    [Distance between 2 points]
    [3 Points Angle]
    [4 Points Angle]
    [Distance between 2 circles]
    [Perpendicular line]

  • Features

    ・Focus stacking function

The powerful MeasurePRO and the function-rich MeasurePRO-Ex measurement software comparison

 ・Please refer to the table below for the availability of the functions you need

  MeasurePRO-Ex MeasurePRO
Measure distance between 2 points
Focus stacking
Export to excel
Show thumbnails
Adjust screen magnification
Display crossline Multiple Multiple
Display grids
Display X, Y axis scales
Supports Windows XP、Vista、7、8 and 10 (32bit・64bit)

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