TAKENAKA OPTONIC Semiconductor laser projector that consolidated advanced laser technology. Green laser and blue violet laser, etc. are lineups.
It corresponds to a variegated field and the usage by abundant semiconductor laser products.

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Description on the terms used in the catalog and laser-related terms. (the order of ABC)
1 AEL (Accessible Emission Limit)
Defined as the maximum emission level accessible in each class. Laser equipment does not output laser exceeding the AEL prescribed under the safety class (1, 2 or 3B) that the laser belongs to. Laser equipment manufactures indicate an appropriate laser class of laser equipment by evaluating the laser output level according to the prescribed measuring methods in all operation modes available with intended performance, so that the laser output does not exceed the AEL specified for the indicated class.
2 APC (Autmatic power control)
As the ambient temperature is raised, semiconductor laser becomes dark, and it becomes bright as the ambient temperature lowers. The APC circuit monitors output light to maintain constant brightness through feedback control. All our laser products incorporate the APC circuit.
3 Average service life
Semiconductor laser is an electronic component with a shorter service life than LED. The service life depends on operating temperature. Average service life of small laser equipment with 1 mW to 5 mW output is estimated at 10,000 hours. Device manufactures define expiration of service life as the time when the current that flows through the device becomes 20% larger and the failure rate reaches 63.5%. In rated operations, the service life reaches about 30,000 hours. With built-in laser equipment, however, the service life is estimated at 10,000 hours at 50 C. With laser that provides high-power output, the service life is estimated at 3,000 to 5,000 hours.
4 Consumer Product Safety Law
This law is intended to control manufacturing and marketing of specific products in order to prevent possible hazards to general consumers' life and body, and to promote private companies' voluntary activities to ensure safety of consumable living products, thus aiming to protect general consumers' benefit.
5 Electronic cooling
A cooling system using Peltier (semiconductor) device. With a compact body, it is used to cool laser devices and electronic equipment, and incorporated in automotive refrigerators and so on.
6 Enclosure protection
Indicates the enclosure rating to protect equipment against entry of solid body or liquid. Under the IEC standard (IEC60529), the enclosure protection rating is expressed as IP40, IP67 and so on. Laser equipment provides enclosure protection rating of IP40, to ensure protection against entry of a solid body of at least 1 mm diameter. Protection against entry of liquid is not provided.
7 External control function
This function enables modulation and flash control based on TTL level via an external signal. Laser can be turned on only when projection is required, or in synchronization with a CCD camera shutter.
8 Key-operated power switch
For the purpose of safety management, a key-operated power switch is used for AC power supply laser equipment.
9 Light-section method
By projecting line-pattern laser onto a target from the upper diagonal position, the system measures the target profile by converting height data into plane data. This method is applied to 3D measurement based on X-Y plane data and height data along the Z-axis.
10 Line length
For a line pattern, line length indicates a length of the line pattern. For visual applications, note that the line length and line width may be seen in different ways depending on the ambient brightness. For imaging applications, the line length is set shorter than that for visual applications.
11 Line width
Indicates a value of a visible line width in a line pattern. For imaging applications, the line width is defined as a value between the energy peak value (e) for the light quantity and 1/e2 (approx. 13.5%).
12 Manual shutter
A mechanical shutter that blocks laser at the front of a laser emission port to ensure safety.
13 Model identification
Generally, model identification conforms to the following convention:
Example of "LDS163L" 1) "LDS", 2) "1", 3) "63", 4) "L", 5) "-XX" 1) LDS: Series name 2) Light output "1" = 1 mW, "5" = 5 mW, "40" = 40 mW 3) Wavelength "63" = 635 nm, "65" = 650 nm, "53" = 532 nm 4) Light pattern "L" = Line pattern, "S" = Spot pattern 5) "-XX" (at the end of the standard model code) indicates that the product is a modified (semi-standard) model or custom-made model based on the specified standard model.
14 MPE (Maximum Permissible Exposure)
Defined as the maximum level of laser irradiation that has no harmful influence on the human body under normal environment. It does not mean that exposure to laser that exceeds this level immediately results in damage to the body. The maximum permissible exposure of laser is defied as the dose equivalent to one tenths of the level that causes damage to the skin and the retinas at a probability of 50%. MPE depends on wavelength and exposure time. It is expressed in the unit of power density ("W/m2" or "J/m2"). Based on MPE, AEL (Accessible Emission Limit) is determined for laser classification.
15 NOHD (Nominal Ocular Hazard Distance)
Defined as the distance at which beam irradiance or radiant exposure becomes equal to the maximum allowable exposure on the cornea. A laser beam provides excellent straight-forward property. Actually, however, the beam widens so that the beam diameter enlarges as the distance from the laser source becomes longer. As the beam diameter becomes large, the power density lowers. The distance from the laser emission port to the position where the power density falls below MPE is called "Nominal Ocular Hazard Distance (NOHD)". We must be careful against laser exposure within this distance, since the laser exposure level at that distance is higher than MPE. However, it does not mean that laser exposure at a distance longer than NOHD is safe and continuously looking at the laser beam has no hazardous influence.
16 Oscillation wavelength
Indicates a wavelength of laser light. Laser equipment uses wavelengths of approx. 400 nm (bluish purple), 532 nm (green), 635 nm (red) to 800 nm order (infrared ray). For visual applications, wavelengths of 635 nm and 532 nm provide excellent visibility.
17 Power supply voltage
The standard power supply voltage is defined as 5 VDC to 6 VDC 5%. For standard models, 5 VDC should be used. Even if the product is used with a 6 VDC power supply, there is no significant difference in light quantity and service life. Since the laser element is noise-sensitive, use a stabilized power supply with less impulse noise. If the power cable length is long, the power supply may be affected by noise interference in the middle of the power line. It is recommended that the power supply should be installed as close to the laser equipment as possible, and the AC power cable can be extended as required.
18 PLC control
Laser ON/OFF status can be controlled with a PLC.
19 Projection system
A laser beam can be focused at a certain distance through a lens. For lens focus adjustment, the variable lens focus system and the fixed lens focus system are available. With the variable lens focus system, the focus distance can be adjusted up to infinity. In practical use, however, a lens whose outer diameter is 12 mm order provides a focus distance of approx. 5 m. At a longer distance, the light quantity becomes extremely low. The projection system uses an aspheric lens or spherical lens. The lens materials are plastic and glass. A high-grade model uses a glass lens to ensure temperature stability.
20 Remote connector
Equipped in the LDH and LDHG series, which is classified as Class 3R. When a safety switch is connected, the remote connector can turn off laser through remote control.
21 W.D. (work distance)
Indicates a distance from the laser equipment front surface to the projection surface. Generally, work distance is defined as a distance from the front end of the laser emission port.

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