Abstract: A pressure-sensitive adhesive composition for an optical film of the present invention includes a (meth)acrylic polymer(A) that comprises, as monomer units, 67 to 96.99% by weight of alkyl (meth)acrylate(a1), 1 to 20% by weight of benzyl (meth)acrylate(a2), 2 to 10% by weight of a carboxyl group-containing monomer(a3) and 0.01 to 3% by weight of a hydroxyl group-containing monomer(a4), has a weight average molecular weight(Mw) of 1,600,000 or more, and satisfy a weight average molecular weight(Mw)/number average molecular weight(Mn) ratio of 1.8 to 10. The pressure-sensitive adhesive composition can satisfy durability that does not cause peeling, separation at the state in which the optical film was attached, and can form a pressure-sensitive adhesive layer capable of improving display non-uniformity caused by a white display leakage at a peripheral portion.

Abstract: An electromagnetic wave generator encompasses a first pump beam emitter (2) configured to emit a first pump beam (hv1) having a wavelength larger than one micrometer; a second pump beam emitter (25) configured to emit a wavelength-tunable second pump beam (hv2) having a wavelength larger than one micrometer, the wavelength of which is different from the wavelength of the first pump beam (hv1); a nonlinear optical crystal (19) configured to generate an electromagnetic wave (hv3) of a difference frequency between the first pump beam (hv1) and second pump beam (hv2); and an optical system (M1, M2, 18) configured to irradiate the first pump beam (hv1) and second pump beam (hv2) to the nonlinear optical crystal (19), by adjusting an external intersection angle between the first pump beam (hv1) and second pump beam (hv2) within 0.5° at the difference frequency of 1 THz.

Abstract: An electromagnetic wave generator encompasses a first pump beam emitter (2) configured to emit a first pump beam (hv1) having a wavelength larger than one micrometer; a second pump beam emitter (25) configured to emit a wavelength-tunable second pump beam (hv2) having a wavelength larger than one micrometer, the wavelength of which is different from the wavelength of the first pump beam (hv1); a nonlinear optical crystal (19) configured to generate an electromagnetic wave (hv3) of a difference frequency between the first pump beam (hv1) and second pump beam (hv2); and an optical system (M1, M2, 18) configured to irradiate the first pump beam (hv1) and second pump beam (hv2) to the nonlinear optical crystal (19), by adjusting an external intersection angle between the first pump beam (hv1) and second pump beam (hv2) within 0.5° at the difference frequency of 1 THz.

Abstract: In a system for detecting misfire for an internal combustion engine wherein ionization current that flows following the discharge current is detected and integrated during a period (gate) and occurrence of misfire of the engine is detected based on the integrated value, a processing delay circuit is provided which inputs at least one of the discharge current or the ionization current and based on the inputted current, delays starting of the period by a time point which is not earlier than termination of the discharge current. With this, the system is unaffected by fluctuation in ignition coil discharge period, various kinds of noise and the like, and can therefore ensure accurate misfire detection by preventing erroneous detection owing to such causes.

Abstract: In a system for detecting misfire for an internal combustion engine wherein ionization current that flows following the discharge current is detected and integrated during a period (gate) and occurrence of misfire of the engine is detected based on the integrated value, a processing delay circuit is provided which inputs at least one of the discharge current or the ionization current and based on the inputted current, delays starting of the period by a time point which is not earlier than termination of the discharge current. With this, the system is unaffected by fluctuation in ignition coil discharge period, various kinds of noise and the like, and can therefore ensure accurate misfire detection by preventing erroneous detection owing to such causes.