GLOSSARY

The degree as a unit of angle is the angle to the center of the arc that divides the circumference of the circle into 360 equal parts. The angle to the center of the arc that divides 1 degree further into 60 equal parts is the minute, and the angle to the center of the arc that divides this minute further into 60 equal parts is the second. TM-2070 has a Repeatability of 1 second.

It is a unit of plane angle in the International System of Unit Measures (SI). 1 radian is the magnitude of the central angle to an arc equal to the length of the radius of the circle, which is 57 degrees 17 minutes 44.8 seconds.
Denoted as “rad”.

MTF（Modulation Transfer Function）is an index for evaluating the performance of an optical system. Specifically, it is a measure of how well an optical system (e.g., camera lens or telescope) is able to convey clear and fine detail.
The MTF is usually defined as the contrast transfer function with respect to spatial frequency. This indicates how much contrast is maintained in the spatial frequency components of the input image as it passes through the system. Higher MTF values mean that the system can better reproduce detailed structures, providing sharper, higher resolution images.
In the optics industry, MTF is widely used for design and evaluation of cameras and lenses, and image resolution evaluation, among others.

Aberration is an optical defect or error that occurs when light is collected or an image is formed in an optical system. Aberrations can reduce the ability of an optical system to accurately form an ideal image.

OIS as used in the camera industry stands for Optical Image Stabilization. This technology corrects camera shake (minute movements of the camera) that occur when taking pictures.

OIS suppresses camera shake by placing sensors and lenses within the optical system to detect minute vibrations and movements of the camera and fine-tune the lens or image sensor accordingly. This technology reduces blurring of images caused by shaking or movement during shooting, enabling clearer and sharper photos and videos.

OIS is especially effective in low-light environments and telephoto photography, providing a stable image for the subject you want to capture. Generally, this is implemented on the hardware side of the camera, and the effect is particularly noticeable when shooting with telephoto lenses or hand-held.

Modern smartphone cameras also have OIS, which allows for more stable hand-held shooting. We offer the best sensor for this OIS evaluation, the high-speed 5D sensor (MF-5550-0002, MF-5570-0002).

VCM, as used in the smartphone industry, is an abbreviation for “Voice Coil Motor. This is a type of motor used to operate the lens, such as focusing and zooming.

Specifically, the VCM has a structure consisting of a coil and a magnet. Applying an electric current causes the coil to be attracted to or away from the magnet, thereby fine-tuning the position of the lens.

It is mainly used in camera modules to enable auto-focus (AF) functions and to move the lens during zooming operations.

Smartphone cameras are very thin and compact, making VCMs a very suitable option. The advantages of VCMs are their small size, high speed, and precision operation. This technology allows smartphone cameras to offer high-performance autofocus and zoom capabilities. We have a lineup of various displacement tilt sensors that are ideal for evaluating VCM for AF.

SMA used in the smartphone industry refers to shape memory alloys. Specifically, it is used in the following situations.

Camera module autofocus: Because SMA can exert powerful forces in a small space, they are used in autofocus mechanisms within smartphone camera modules. This allows for quick and accurate focus adjustments.

We have a lineup of various displacement tilt sensors that are ideal for evaluating the autofocus function of SMA.

Represents the error with respect to the ideal straight line.
Example: Linearity of TM-2070 is +/- 0.25% of F.S. F.S. (full scale) is +/- 70 minutes, so 140 minutes. Applying the formula, +/- 0.25% * 140 min = +/- 0.35 min. In other words, the measured value = actual slope +/- 0.35 min (range).

There will always be some variation in the measured values. Repeatability is an indicator of the degree of variation in the measured values while stationary.
Details are in accordance with the conditions described in each product information.

It is an indicator of how finely the measured values, etc. can be divided.
In our case, we mean the Repeatability value. Some customers also refer to it as measurement resolution.

It refers to the smallest unit that can be output by the measuring device itself.
Also called display resolution by some customers.

This is an index showing the number of measurement value output per hour.
The larger this number, the more data is output.