ＹＨＴＣ List of Products and Services

The Emergency Medical Information Kit, as explained by Professor Takiko Okamoto of Meiji Gakuin University, was proposed to Minato Ward and the Tokyo Fire Department based on the "Emergency Medical Information Kit" system implemented in Portland, Oregon, USA. It has been in use at the Minato Ward Office since May 2008. Individuals fill out an A4 form with personal medical history, emergency contact information, and store it in the kit. The kit is designated to be kept in the refrigerator, and a magnetic seal indicating its storage location is placed on the refrigerator door, along with a sticker on the inside of the entrance door, standardized across the nation. In the event of a sudden illness when living alone or when family members are not present, even if one can call an ambulance, it would be beneficial to reliably communicate information such as medical history, pre-existing conditions, blood type, medications being taken, and emergency contact details to the emergency responders. The "Emergency Medical Information Kit" was created to fulfill this role. Our company offers the "Emergency Medical Information Kit," as shown in the photo below, at the lowest price to assist in its promotion by local neighborhood associations, municipalities, and fire departments. We also accept orders for kits with unique regional designs and customized name stickers.

• Municipal services and business location

Our temperature controller is a Peltier control device that maintains a specified temperature regardless of external factors by controlling the current flowing through the Peltier element based on the resistance changes obtained from a thermistor using PID control. When the temperature control unit is removed from the semiconductor laser drive system, fluctuations in optical power and wavelength occur. When heat is added to a bubble, its volume expands. Additionally, the resistance value of the measured substance changes when temperature is either increased or decreased. When temperature is reduced from a photodiode, the dark current decreases. In this way, the temperature controller demonstrates its effectiveness in controlling temperature-dependent physical properties that exist in the world. The feature of this device is that it allows anyone to easily achieve temperature control with compensated accuracy of 1/100°C to 1/10°C by using a thermistor (with linear correction circuit) or a platinum sensor for the temperature sensor and flowing PID (proportional, integral, derivative) control current to the Peltier or heater. Sufficient consideration must be given to the mass of the constant temperature plate, the capacity of the heat sink for heat dissipation, and the capacity of the Peltier used, depending on the load capacity of the substance being temperature-controlled.

• Heat exchanger

A semiconductor laser (LD) is a device that generates laser oscillation by passing current through a semiconductor. The mechanism of light emission is similar to that of a light-emitting diode (LED), where light is produced by flowing current in the forward direction of the pn junction. The forward direction means connecting the power supply so that the p-side is positive and the n-side is negative, allowing electrons to flow in from the n-side and holes from the p-side. When these two collide at the junction, light is generated as electrons fall into holes. The structure of the LD consists of an active layer (emission layer) sandwiched between n-type and p-type cladding layers, built on an n-type substrate, allowing current to flow from the electrodes. The end faces of the active layer serve as mirrors, reflecting light. When a voltage is applied in the forward direction, electrons flow from the n-type cladding layer and holes from the p-type cladding layer into the active layer, where they recombine to produce light. This light is not yet laser light; since the refractive index of the cladding layer is lower than that of the active layer, the light is confined within the active layer. Additionally, the end faces of the active layer act as mirrors, causing the light to be amplified as it travels back and forth within the active layer, resulting in stimulated emission (a phenomenon where strong light of coherent phase is generated), which produces laser light. The key difference between this process and that of an LED is that in the case of an LED, the emitted light is released directly to the outside without being reflected back.

• Laser Components

【Semiconductor Laser Light Source / LD Light Source】 A stabilized reference LD light source that reproduces the specifications and performance of the mounted LD elements as closely as possible. LD elements with wavelengths ranging from UV to far infrared are available for mounting. 【Light Source Control Elements】 ★ Adoption of noise resistance. ★ APC drive control & ACC drive control circuits. ★ LD element protection circuit. ★ Temperature control: ±1/100℃ control. PID control circuit adopted. ★ We offer LD elements with suitable wavelengths and power for customers from both domestic and international markets. ★ Below, we introduce a semiconductor laser (LD) mounting fixture designed to enable safe operation. ★ Connectors suitable for various PIN configurations dedicated to LDs are adopted. ★ Φ0.7 micro platinum resistance body & thermistor adopted.

• controller
• Floodlight
• Laser Components