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Maximum Magnification Module

Two objective lenses–wide field and high power (N.A. 0.55)

The combination of these two objective lenses enables a broad array of applications ranging from wide-field observations at low magnifications to accurate measurements at high magnifications.

Newly developed maximum magnification module VMR-Z120X

The new module achieves a wide magnification range from 1X to 120X by changing the optical path of two objective lenses. Used in combination with 8-step zoom, it provides optimum magnifications in all applications from observations in wide fields of view at low magnifications to measurements of minuscule linewidths down to 1µm.

Optical magnification 1X 2X 4X 7.5X
Total magnification 36X 72X 144X 270X
Field of view (mm) 4.67X3.5 2.33X1.75 1.165X0.875 0.622X0.467
Optical magnification 16X 32X 64X 120X
Total magnification 576X 1146X 2292X 4320X
Field of view (mm) 0.291X0.218 0.146X0.109 0.073X0.055 0.039X0.029
  • *Total magnifications listed above represent those on the monitor screen when a 20" TFT monitor is set to the UXGA (1600 x 1200 pixels) mode.
  • *1X–7.5X when the low magnification lens is used, 16X–120X with high magnification lens.


1X


2X


4X


7.5X


16X


32X


64X


120X

High-resolution TTL Laser AF with ultra tiny laser spot

The module comes with a high-resolution TTL Laser AF that incorporates high N.A. objectives and achieves ultra tiny laser spots. It significantly improves performance in focusing on and scanning over thin, transparent/semitransparent (e.g. resists) surfaces or irregular reflection surfaces. High-speed scanning measurement is possible at a rate of 1000 points per second max., enabling ultra-precise Z-axis measurements in a variety of applications.


How TTL Laser AF works


Minute steps measured

Three illumination types

The module delivers the best illumination to any workpieces by providing three types of CNC controllable illuminations–episcopic, diascopic (high magnification head), and darkfield illuminations. This enables edges to be detected with high accuracy.


Low magnifications darkfield illumination


High magnifications darkfield illumination


Episcopic illumination


Darkfield illumination

High-speed, high-precision Vision AF

Thanks to the adoption of a new algorithm and a progressive scan type of camera, Vision AF now provides greater speeds and accuracy closer to those with TTL Laser AF. Vision AF is convenient for applications where TTL Laser AF cannot be used, for example, when focusing on chamfered or round edges.